diff --git a/arch/arm/src/stm32/stm32_hciuart.c b/arch/arm/src/stm32/stm32_hciuart.c
index 2fc5982706..3da5ae2f78 100644
--- a/arch/arm/src/stm32/stm32_hciuart.c
+++ b/arch/arm/src/stm32/stm32_hciuart.c
@@ -25,6 +25,7 @@
 #include <nuttx/config.h>
 
 #include <sys/types.h>
+#include <inttypes.h>
 #include <stdint.h>
 #include <stdbool.h>
 #include <unistd.h>
@@ -776,7 +777,7 @@ static void hciuart_enableints(const struct hciuart_config_s *config,
   cr2 |= (intset & USART_CR3_EIE);
   hciuart_putreg32(config, STM32_USART_CR3_OFFSET, cr2);
 
-  wlinfo("CR1 %08x CR2 %08x\n", cr1, cr2);
+  wlinfo("CR1 %08" PRIx32 " CR2 %08" PRIx32 "\n", cr1, cr2);
 }
 
 /****************************************************************************
@@ -808,7 +809,7 @@ static void hciuart_disableints(const struct hciuart_config_s *config,
   cr2 &= ~(intset & USART_CR3_EIE);
   hciuart_putreg32(config, STM32_USART_CR3_OFFSET, cr2);
 
-  wlinfo("CR1 %08x CR2 %08x\n", cr1, cr2);
+  wlinfo("CR1 %08" PRIx32 " CR2 %08" PRIx32 "\n", cr1, cr2);
 }
 
 /****************************************************************************
@@ -1725,7 +1726,7 @@ static int hciuart_interrupt(int irq, void *context, void *arg)
       /* Get the masked USART status word. */
 
       status = hciuart_getreg32(config, STM32_USART_SR_OFFSET);
-      wlinfo("status %08x\n", status);
+      wlinfo("status %08" PRIx32 "\n", status);
 
       /* USART interrupts:
        *
@@ -2317,7 +2318,7 @@ static ssize_t hciuart_rxdrain(const struct btuart_lowerhalf_s *lower)
   ssize_t nbytes;
   bool rxenable;
 
-  wlinfo("config %p\n");
+  wlinfo("config %p\n", config);
 
   DEBUGASSERT(config != NULL && config->state != NULL);
   state = config->state;