diff --git a/arch/arm/src/lpc43xx/lpc43_tickless_rit.c b/arch/arm/src/lpc43xx/lpc43_tickless_rit.c
index 44eba05bbc..daf4bc7888 100644
--- a/arch/arm/src/lpc43xx/lpc43_tickless_rit.c
+++ b/arch/arm/src/lpc43xx/lpc43_tickless_rit.c
@@ -35,6 +35,8 @@
 #include <errno.h>
 #include <time.h>
 
+#include <sys/param.h>
+
 #include <nuttx/irq.h>
 #include <nuttx/arch.h>
 #include <nuttx/clock.h>
@@ -46,14 +48,6 @@
 
 #ifdef CONFIG_SCHED_TICKLESS
 
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-#ifndef min
-#  define min(a,b) (a < b ? a : b)
-#endif
-
 /****************************************************************************
  * Private Data
  ****************************************************************************/
@@ -428,13 +422,13 @@ static bool lpc43_tl_set_calc_arm(uint32_t curr, uint32_t to_set, bool arm)
 
   if (curr < TO_RESET_NEXT)
     {
-      calc_time = min(TO_RESET_NEXT, to_set);
+      calc_time = MIN(TO_RESET_NEXT, to_set);
     }
   else
     {
       if (curr < TO_END)
         {
-          calc_time = min(curr + RESET_TICKS, to_set);
+          calc_time = MIN(curr + RESET_TICKS, to_set);
         }
       else
         {
diff --git a/arch/arm/src/lpc54xx/lpc54_tickless.c b/arch/arm/src/lpc54xx/lpc54_tickless.c
index bd6278b85e..6740e08a7b 100644
--- a/arch/arm/src/lpc54xx/lpc54_tickless.c
+++ b/arch/arm/src/lpc54xx/lpc54_tickless.c
@@ -27,6 +27,8 @@
 #include <errno.h>
 #include <time.h>
 
+#include <sys/param.h>
+
 #include <nuttx/irq.h>
 #include <nuttx/arch.h>
 #include <nuttx/clock.h>
@@ -42,10 +44,6 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
-#ifndef min
-#  define min(a,b) (a < b ? a : b)
-#endif
-
 #define COUNTER_MAX 0x0000ffffffffffffllu
 
 /****************************************************************************
@@ -468,13 +466,13 @@ static bool lpc54_set_calc_arm(uint64_t curr, uint64_t to_set, bool arm)
 
   if (curr < g_to_reset_next)
     {
-      calc_time = min(g_to_reset_next, to_set);
+      calc_time = MIN(g_to_reset_next, to_set);
     }
   else
     {
       if (curr < g_to_end)
         {
-          calc_time = min(curr + g_reset_ticks, to_set);
+          calc_time = MIN(curr + g_reset_ticks, to_set);
         }
       else
         {
diff --git a/arch/arm/src/s32k3xx/s32k3xx_emac.c b/arch/arm/src/s32k3xx/s32k3xx_emac.c
index e5be2db74a..8f4d734154 100644
--- a/arch/arm/src/s32k3xx/s32k3xx_emac.c
+++ b/arch/arm/src/s32k3xx/s32k3xx_emac.c
@@ -35,6 +35,8 @@
 #include <debug.h>
 #include <errno.h>
 
+#include <sys/param.h>
+
 #include <arpa/inet.h>
 
 #include <nuttx/wdog.h>
@@ -138,10 +140,6 @@
 #  warning "You are using an incomplete/untested configuration"
 #endif
 
-#ifndef min
-#  define min(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
 /* We need at least one more free buffer than transmit buffers */
 
 #define S32K3XX_EMAC_NFREEBUFFERS (CONFIG_S32K3XX_ENET_NTXBUFFERS+1)
@@ -1319,7 +1317,7 @@ static int s32k3xx_recvframe(struct s32k3xx_driver_s *priv)
 
                   up_invalidate_dcache((uintptr_t)dev->d_buf,
                                       (uintptr_t)dev->d_buf +
-                                      min(dev->d_len, ALIGNED_BUFSIZE));
+                                      MIN(dev->d_len, ALIGNED_BUFSIZE));
 
                   ninfo("rxhead: %p d_buf: %p d_len: %d\n",
                       priv->rxhead, dev->d_buf, dev->d_len);
diff --git a/arch/arm/src/s32k3xx/s32k3xx_progmem.c b/arch/arm/src/s32k3xx/s32k3xx_progmem.c
index 89975829c7..38be56657d 100644
--- a/arch/arm/src/s32k3xx/s32k3xx_progmem.c
+++ b/arch/arm/src/s32k3xx/s32k3xx_progmem.c
@@ -30,6 +30,8 @@
 #include <assert.h>
 #include <errno.h>
 
+#include <sys/param.h>
+
 #include "hardware/s32k3xx_pflash.h"
 #include "hardware/s32k3xx_xrdc.h"
 
@@ -51,11 +53,6 @@
 # error Progmem must be a multiple of 8
 #endif
 
-#define min(a,b) \
-  ({ __typeof__ (a) _a = (a); \
-      __typeof__ (b) _b = (b); \
-    _a < _b ? _a : _b; })
-
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -392,7 +389,7 @@ ssize_t up_progmem_write(size_t addr, const void *buf, size_t count)
 
       execute_init_sequence(dest);
 
-      for (i = 0; i < min(32, words_to_write); i++)
+      for (i = 0; i < MIN(32, words_to_write); i++)
         {
           if (offset > 0)
             {
diff --git a/arch/arm/src/s32k3xx/s32k3xx_qspi.c b/arch/arm/src/s32k3xx/s32k3xx_qspi.c
index c587008f22..4fde2bdb66 100644
--- a/arch/arm/src/s32k3xx/s32k3xx_qspi.c
+++ b/arch/arm/src/s32k3xx/s32k3xx_qspi.c
@@ -29,6 +29,7 @@
 #include <nuttx/config.h>
 
 #include <sys/types.h>
+#include <sys/param.h>
 #include <stdint.h>
 #include <stdbool.h>
 #include <stdlib.h>
@@ -75,8 +76,6 @@
 #define ALIGN_UP(n)       (((n)+ALIGN_MASK) & ~ALIGN_MASK)
 #define IS_ALIGNED(n)     (((uint32_t)(n) & ALIGN_MASK) == 0)
 
-#define min(a, b)   (((a) < (b)) ? (a) : (b))
-
 /* LUT entries used for various command sequences                 */
 #define QSPI_LUT_READ        0U /* Quad Output read               */
 #define QSPI_LUT_WRITE       1U /* Quad write                     */
@@ -683,7 +682,7 @@ static int qspi_receive_blocking(struct s32k3xx_qspidev_s *priv,
   uint32_t regval;
   int ret = 0;
 
-  readlen = min(128, remaining);
+  readlen = MIN(128, remaining);
 
   /* Copy sequence in LUT registers */
 
@@ -703,7 +702,7 @@ static int qspi_receive_blocking(struct s32k3xx_qspidev_s *priv,
       regval |= QSPI_MCR_CLR_RXF;
       putreg32(regval, S32K3XX_QSPI_MCR);
 
-      readlen = min(128, remaining);
+      readlen = MIN(128, remaining);
 
 #ifdef CONFIG_S32K3XX_QSPI_INTERRUPTS
       /* enable end of transfer interrupt for asynchronous transfers */
@@ -886,7 +885,7 @@ static int qspi_transmit_blocking(struct s32k3xx_qspidev_s *priv,
   uint32_t regval;
   uint32_t count = UINT32_MAX;
   uint32_t *data = (uint32_t *)meminfo->buffer;
-  uint32_t write_cycle = min(32, ((uint32_t)remaining) >> 2U);
+  uint32_t write_cycle = MIN(32, ((uint32_t)remaining) >> 2U);
   uint32_t timeout = 1000;
   int ret = 0;
 
diff --git a/arch/arm/src/stm32f0l0g0/stm32_pwm.h b/arch/arm/src/stm32f0l0g0/stm32_pwm.h
index 2cdb8f3324..93757a06dc 100644
--- a/arch/arm/src/stm32f0l0g0/stm32_pwm.h
+++ b/arch/arm/src/stm32f0l0g0/stm32_pwm.h
@@ -50,6 +50,8 @@
 #include <nuttx/config.h>
 #include <arch/board/board.h>
 
+#include <sys/param.h>
+
 #include "chip.h"
 #include "hardware/stm32_tim.h"
 
@@ -326,15 +328,13 @@
 #endif
 #define PWM_TIM17_NCHANNELS PWM_TIM17_CHANNEL1
 
-#define PWM_MAX(a, b) ((a) > (b) ? (a) : (b))
-
-#define PWM_NCHANNELS PWM_MAX(PWM_TIM1_NCHANNELS, \
-                      PWM_MAX(PWM_TIM2_NCHANNELS, \
-                      PWM_MAX(PWM_TIM3_NCHANNELS, \
-                      PWM_MAX(PWM_TIM14_NCHANNELS, \
-                      PWM_MAX(PWM_TIM15_NCHANNELS, \
-                      PWM_MAX(PWM_TIM16_NCHANNELS, \
-                              PWM_TIM17_NCHANNELS))))))
+#define PWM_NCHANNELS MAX(PWM_TIM1_NCHANNELS, \
+                      MAX(PWM_TIM2_NCHANNELS, \
+                      MAX(PWM_TIM3_NCHANNELS, \
+                      MAX(PWM_TIM14_NCHANNELS, \
+                      MAX(PWM_TIM15_NCHANNELS, \
+                      MAX(PWM_TIM16_NCHANNELS, \
+                          PWM_TIM17_NCHANNELS))))))
 
 #else  /* !CONFIG_PWM_MULTICHAN */
 
diff --git a/arch/arm/src/stm32h7/stm32_ethernet.c b/arch/arm/src/stm32h7/stm32_ethernet.c
index 14e468cfa4..567d4b0cb1 100644
--- a/arch/arm/src/stm32h7/stm32_ethernet.c
+++ b/arch/arm/src/stm32h7/stm32_ethernet.c
@@ -33,6 +33,8 @@
 #include <debug.h>
 #include <errno.h>
 
+#include <sys/param.h>
+
 #include <arpa/inet.h>
 
 #include <nuttx/arch.h>
@@ -213,10 +215,6 @@
 #  define CONFIG_STM32H7_ETH_NTXDESC 4
 #endif
 
-#ifndef min
-#  define min(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
 /* We need at least one more free buffer than transmit buffers */
 
 #define STM32_ETH_NFREEBUFFERS (CONFIG_STM32H7_ETH_NTXDESC+1)
@@ -1795,7 +1793,7 @@ static int stm32_recvframe(struct stm32_ethmac_s *priv)
 
                       up_invalidate_dcache((uintptr_t)dev->d_buf,
                                            (uintptr_t)dev->d_buf +
-                                           min(dev->d_len, ALIGNED_BUFSIZE));
+                                           MIN(dev->d_len, ALIGNED_BUFSIZE));
 
                       ninfo("rxhead: %p d_buf: %p d_len: %d\n",
                             priv->rxhead, dev->d_buf, dev->d_len);
diff --git a/arch/risc-v/src/common/riscv_pmp.c b/arch/risc-v/src/common/riscv_pmp.c
index 0e32f1be53..a802074ab7 100644
--- a/arch/risc-v/src/common/riscv_pmp.c
+++ b/arch/risc-v/src/common/riscv_pmp.c
@@ -27,6 +27,8 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+#include <sys/param.h>
+
 #include <nuttx/compiler.h>
 #include <nuttx/arch.h>
 #include <nuttx/irq.h>
@@ -77,14 +79,6 @@
     region##_val; \
   })
 
-#ifndef min
-#define min(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-#ifndef max
-#define max(a,b) ((a) > (b) ? (a) : (b))
-#endif
-
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -680,7 +674,7 @@ int riscv_check_pmp_access(uintptr_t attr, uintptr_t base, uintptr_t size)
             {
               /* Found matching region that allows access */
 
-              size -= min(end, entry.end) - max(base, entry.base);
+              size -= MIN(end, entry.end) - MAX(base, entry.base);
             }
           else
             {
diff --git a/arch/risc-v/src/litex/litex_sdio.c b/arch/risc-v/src/litex/litex_sdio.c
index 9be0b2e958..13359662a3 100644
--- a/arch/risc-v/src/litex/litex_sdio.c
+++ b/arch/risc-v/src/litex/litex_sdio.c
@@ -32,6 +32,8 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <sys/param.h>
+
 #include <nuttx/arch.h>
 #include <nuttx/cache.h>
 #include <nuttx/clock.h>
@@ -88,9 +90,6 @@
 #  define CONFIG_LITEX_SD4BIT_FREQ 50000000  /* 25MHz SD 4-bit, normal clocking */
 #endif
 
-#define max(x, y) (((x) > (y)) ? (x) : (y))
-#define min(x, y) (((x) < (y)) ? (x) : (y))
-
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -626,7 +625,7 @@ static void litex_clock(struct sdio_dev_s *dev, enum sdio_clock_e rate)
   uint32_t divider;
   divider = clk_freq ? litex_get_hfclk() / clk_freq : MAX_DIVIDER;
   divider = litex_pow2roundup(divider);
-  divider = min(max(divider, 2), MAX_DIVIDER);
+  divider = MIN(MAX(divider, 2), MAX_DIVIDER);
 
   /* this is the *effective* new clk_freq */
 
diff --git a/drivers/crypto/dev_urandom.c b/drivers/crypto/dev_urandom.c
index 8d3affd569..b6c6efda87 100644
--- a/drivers/crypto/dev_urandom.c
+++ b/drivers/crypto/dev_urandom.c
@@ -29,6 +29,7 @@
 #include <nuttx/config.h>
 
 #include <sys/types.h>
+#include <sys/param.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
@@ -79,8 +80,6 @@ union xorshift128_state_u
  * Private Function Prototypes
  ****************************************************************************/
 
-#define min(a, b)   (((a) < (b)) ? (a) : (b))
-
 static ssize_t devurand_read(FAR struct file *filep, FAR char *buffer,
                              size_t buflen);
 static ssize_t devurand_write(FAR struct file *filep, FAR const char *buffer,
@@ -220,7 +219,7 @@ static ssize_t devurand_write(FAR struct file *filep, FAR const char *buffer,
 #ifdef CONFIG_DEV_URANDOM_CONGRUENTIAL
   unsigned int seed = 0;
 
-  len = min(len, sizeof(unsigned int));
+  len = MIN(len, sizeof(unsigned int));
   memcpy(&seed, buffer, len);
   srand(seed);
   return len;
@@ -242,7 +241,7 @@ static ssize_t devurand_write(FAR struct file *filep, FAR const char *buffer,
     {
       /* Make unaligned input aligned. */
 
-      currlen = min(sizeof(uint32_t) - ((uintptr_t)buffer & alignmask), len);
+      currlen = MIN(sizeof(uint32_t) - ((uintptr_t)buffer & alignmask), len);
       memcpy(&tmp, buffer, currlen);
       up_rngaddint(RND_SRC_SW, tmp);
 
@@ -276,7 +275,7 @@ static ssize_t devurand_write(FAR struct file *filep, FAR const char *buffer,
 
   return initlen;
 #else
-  len = min(len, sizeof(g_prng.u));
+  len = MIN(len, sizeof(g_prng.u));
   memcpy(&g_prng.u, buffer, len);
   return len;
 #endif
diff --git a/drivers/usbdev/pl2303.c b/drivers/usbdev/pl2303.c
index b995babe55..9248acd76f 100644
--- a/drivers/usbdev/pl2303.c
+++ b/drivers/usbdev/pl2303.c
@@ -37,6 +37,8 @@
 #include <errno.h>
 #include <debug.h>
 
+#include <sys/param.h>
+
 #include <nuttx/irq.h>
 #include <nuttx/kmalloc.h>
 #include <nuttx/arch.h>
@@ -199,18 +201,6 @@
 #define PL2303_RWREQUEST_TYPE      (0x40)
 #define PL2303_RWREQUEST           (0x01) /* IN/OUT, Recipient device */
 
-/* Misc Macros **************************************************************/
-
-/* min/max macros */
-
-#ifndef min
-#  define min(a,b) ((a)<(b)?(a):(b))
-#endif
-
-#ifndef max
-#  define max(a,b) ((a)>(b)?(a):(b))
-#endif
-
 /* Trace values *************************************************************/
 
 #define PL2303_CLASSAPI_SETUP       TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_SETUP)
@@ -617,7 +607,7 @@ static int usbclass_sndpacket(FAR struct pl2303_dev_s *priv)
 
   /* Get the maximum number of bytes that will fit into one bulk IN request */
 
-  reqlen = max(CONFIG_PL2303_BULKIN_REQLEN, ep->maxpacket);
+  reqlen = MAX(CONFIG_PL2303_BULKIN_REQLEN, ep->maxpacket);
 
   while (!sq_empty(&priv->reqlist))
     {
@@ -1809,7 +1799,7 @@ static int usbclass_setup(FAR struct usbdevclass_driver_s *driver,
               {
               case PL2303_SETLINEREQUEST:
                 {
-                   memcpy(priv->linest, ctrlreq->buf, min(len, 7));
+                   memcpy(priv->linest, ctrlreq->buf, MIN(len, 7));
                    ret = 0;
                 }
                 break;
@@ -1897,7 +1887,7 @@ static int usbclass_setup(FAR struct usbdevclass_driver_s *driver,
 
   if (ret >= 0)
     {
-      ctrlreq->len   = min(len, ret);
+      ctrlreq->len   = MIN(len, ret);
       ctrlreq->flags = USBDEV_REQFLAGS_NULLPKT;
       ret            = EP_SUBMIT(dev->ep0, ctrlreq);
       if (ret < 0)
diff --git a/drivers/usbdev/rndis.c b/drivers/usbdev/rndis.c
index 3f01f6c9fe..52b5e7fa49 100644
--- a/drivers/usbdev/rndis.c
+++ b/drivers/usbdev/rndis.c
@@ -35,6 +35,8 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+#include <sys/param.h>
+
 #include <nuttx/queue.h>
 #include <nuttx/net/net.h>
 #include <nuttx/net/netdev.h>
@@ -96,14 +98,6 @@
 
 #define ETHWORK                 LPWORK
 
-#ifndef min
-#  define min(a,b) ((a)<(b)?(a):(b))
-#endif
-
-#ifndef max
-#  define max(a,b) ((a)>(b)?(a):(b))
-#endif
-
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -813,7 +807,7 @@ static uint16_t rndis_fillrequest(FAR struct rndis_dev_s *priv,
 
   req->len = 0;
 
-  datalen = min(priv->netdev.d_len,
+  datalen = MIN(priv->netdev.d_len,
                 CONFIG_RNDIS_BULKIN_REQLEN - RNDIS_PACKET_HDR_SIZE);
   if (datalen > 0)
     {
@@ -1135,7 +1129,7 @@ static inline int rndis_recvpacket(FAR struct rndis_dev_s *priv,
         {
           size_t index = priv->current_rx_received -
                          priv->current_rx_datagram_offset;
-          size_t copysize = min(reqlen,
+          size_t copysize = MIN(reqlen,
                                 priv->current_rx_datagram_size - index);
 
           /* Check if the received packet exceeds request buffer */
@@ -2442,7 +2436,7 @@ static int usbclass_setup(FAR struct usbdevclass_driver_s *driver,
 
   if (ret >= 0)
     {
-      ctrlreq->len   = min(len, ret);
+      ctrlreq->len   = MIN(len, ret);
       ctrlreq->flags = USBDEV_REQFLAGS_NULLPKT;
       ret            = EP_SUBMIT(dev->ep0, ctrlreq);
       if (ret < 0)
diff --git a/drivers/wireless/ieee80211/bcm43xxx/bcmf_driver.c b/drivers/wireless/ieee80211/bcm43xxx/bcmf_driver.c
index c4f156ebcc..20f0be4474 100644
--- a/drivers/wireless/ieee80211/bcm43xxx/bcmf_driver.c
+++ b/drivers/wireless/ieee80211/bcm43xxx/bcmf_driver.c
@@ -997,7 +997,7 @@ static int bcmf_wl_scan_format_results(FAR struct bcmf_dev_s *priv,
   for (i = 0; i < priv->scan_result_entries; i++)
     {
       scan_result[i] = &priv->scan_result[i];
-      len += (min(strlen((FAR const char *)scan_result[i]->SSID),
+      len += (MIN(strlen((FAR const char *)scan_result[i]->SSID),
                          32) + 3) & ~3;
     }
 
@@ -1045,7 +1045,7 @@ static int bcmf_wl_scan_format_results(FAR struct bcmf_dev_s *priv,
       iwe = (FAR struct iw_event *)pointer;
       iwe->cmd = SIOCGIWESSID;
       iwe->u.essid.flags = 0;
-      iwe->u.essid.length = min(strlen((FAR const char *)info->SSID), 32);
+      iwe->u.essid.length = MIN(strlen((FAR const char *)info->SSID), 32);
       iwe->u.essid.pointer = (FAR void *)sizeof(iwe->u.essid);
       memcpy(&iwe->u.essid + 1, info->SSID, iwe->u.essid.length);
       iwe->len = IW_EV_LEN(essid) + ((iwe->u.essid.length + 3) & ~3);
diff --git a/drivers/wireless/ieee80211/bcm43xxx/bcmf_utils.h b/drivers/wireless/ieee80211/bcm43xxx/bcmf_utils.h
index b2c399aac1..0c58a18f61 100644
--- a/drivers/wireless/ieee80211/bcm43xxx/bcmf_utils.h
+++ b/drivers/wireless/ieee80211/bcm43xxx/bcmf_utils.h
@@ -26,14 +26,7 @@
  ****************************************************************************/
 
 #include <stdint.h>
-
-#ifndef min
-#define min(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-#ifndef max
-#define max(a,b) ((a) > (b) ? (a) : (b))
-#endif
+#include <sys/param.h>
 
 /****************************************************************************
  * Public Function Prototypes
diff --git a/libs/libc/misc/lib_ncompress.c b/libs/libc/misc/lib_ncompress.c
index 26b4746619..a1c5fc8a4b 100644
--- a/libs/libc/misc/lib_ncompress.c
+++ b/libs/libc/misc/lib_ncompress.c
@@ -87,9 +87,6 @@
 
 #define MARK(a) { asm(" .globl M.a"); asm("M.a:"); }
 
-#undef min
-#define min(a,b) ((a>b) ? b : a)
-
 #ifndef IBUFSIZ
 #  define IBUFSIZ BUFSIZ        /* Defailt input buffer size */
 #endif
diff --git a/libs/libc/stdlib/lib_qsort.c b/libs/libc/stdlib/lib_qsort.c
index 293b4b0e03..0801631f2c 100644
--- a/libs/libc/stdlib/lib_qsort.c
+++ b/libs/libc/stdlib/lib_qsort.c
@@ -47,14 +47,13 @@
 #include <nuttx/config.h>
 
 #include <sys/types.h>
+#include <sys/param.h>
 #include <stdlib.h>
 
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
 
-#define min(a, b)  (a) < (b) ? a : b
-
 #define swapcode(TYPE, parmi, parmj, n) \
   { \
     long i = (n) / sizeof (TYPE); \
@@ -275,10 +274,10 @@ loop:
     }
 
   pn = (FAR char *)base + nel * width;
-  r  = min(pa - (FAR char *)base, pb - pa);
+  r  = MIN(pa - (FAR char *)base, pb - pa);
   vecswap(base, pb - r, r);
 
-  r  = min(pd - pc, pn - pd - width);
+  r  = MIN(pd - pc, pn - pd - width);
   vecswap(pb, pn - r, r);
 
   if ((r = pb - pa) > width)
diff --git a/libs/libc/time/lib_localtime.c b/libs/libc/time/lib_localtime.c
index 93985a4002..8afebf1821 100644
--- a/libs/libc/time/lib_localtime.c
+++ b/libs/libc/time/lib_localtime.c
@@ -58,6 +58,8 @@
 #include <assert.h>
 #include <errno.h>
 
+#include <sys/param.h>
+
 #include <nuttx/time.h>
 #include <nuttx/init.h>
 #include <nuttx/fs/fs.h>
@@ -120,7 +122,6 @@
 /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
 
 #define is_digit(c)         ((unsigned)(c) - '0' <= 9)
-#define BIGGEST(a, b)       (((a) > (b)) ? (a) : (b))
 #define MY_TZNAME_MAX       255
 
 /* Max and min values of the integer type T, of which only the bottom
@@ -150,7 +151,7 @@
  * for ttunspecified to work without crashing.
  */
 
-#define CHARS_EXTRA         (BIGGEST(sizeof(UNSPEC), 2) - 1)
+#define CHARS_EXTRA         (MAX(sizeof(UNSPEC), 2) - 1)
 
 #define JULIAN_DAY            0  /* Jn = Julian day */
 #define DAY_OF_YEAR           1  /* n = day of year */
@@ -268,7 +269,7 @@ struct state_s
   time_t ats[TZ_MAX_TIMES];
   unsigned char types[TZ_MAX_TIMES];
   struct ttinfo_s ttis[TZ_MAX_TYPES];
-  char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + CHARS_EXTRA, sizeof("UTC")),
+  char chars[MAX(MAX(TZ_MAX_CHARS + CHARS_EXTRA, sizeof("UTC")),
                     (2 * (MY_TZNAME_MAX + 1)))];
   struct lsinfo_s lsis[TZ_MAX_LEAPS];