diff --git a/include/hex2bin.h b/include/hex2bin.h
index f976f607ee..a5b9eda35b 100644
--- a/include/hex2bin.h
+++ b/include/hex2bin.h
@@ -100,8 +100,8 @@ extern "C"
 struct lib_instream_s;
 struct lib_sostream_s;
 int hex2bin(FAR struct lib_instream_s *instream,
-            FAR struct lib_sostream_s *outstream, uint32_t baseaddr,
-            uint32_t endpaddr, enum hex2bin_swap_e swap);
+            FAR struct lib_sostream_s *outstream, unsigned long baseaddr,
+            unsigned long endpaddr, enum hex2bin_swap_e swap);
 
 /****************************************************************************
  * Name: hex2mem
@@ -127,7 +127,7 @@ int hex2bin(FAR struct lib_instream_s *instream,
  *
  ****************************************************************************/
 
-int hex2mem(int fd, uint32_t baseaddr, uint32_t endpaddr,
+int hex2mem(int fd, unsigned long baseaddr, unsigned long endpaddr,
             enum hex2bin_swap_e swap);
 
 /****************************************************************************
@@ -154,8 +154,8 @@ int hex2mem(int fd, uint32_t baseaddr, uint32_t endpaddr,
  *
  ****************************************************************************/
 
-int fhex2mem(FAR FILE *instream, uint32_t baseaddr, uint32_t endpaddr,
-             enum hex2bin_swap_e swap);
+int fhex2mem(FAR FILE *instream, unsigned long baseaddr,
+             unsigned long endpaddr, enum hex2bin_swap_e swap);
 
 #undef EXTERN
 #ifdef __cplusplus
diff --git a/libs/libc/hex2bin/lib_fhex2mem.c b/libs/libc/hex2bin/lib_fhex2mem.c
index 81713b96d1..c8191d485a 100644
--- a/libs/libc/hex2bin/lib_fhex2mem.c
+++ b/libs/libc/hex2bin/lib_fhex2mem.c
@@ -60,8 +60,8 @@
  *
  ****************************************************************************/
 
-int fhex2mem(FAR FILE *instream, uint32_t baseaddr, uint32_t endpaddr,
-             enum hex2bin_swap_e swap)
+int fhex2mem(FAR FILE *instream, unsigned long baseaddr,
+             unsigned long endpaddr, enum hex2bin_swap_e swap)
 {
   struct lib_stdinstream_s stdinstream;
   struct lib_memsostream_s memoutstream;
@@ -81,7 +81,7 @@ int fhex2mem(FAR FILE *instream, uint32_t baseaddr, uint32_t endpaddr,
   /* And do the deed */
 
   return hex2bin(&stdinstream.public, &memoutstream.public,
-                 (uint32_t)baseaddr, (uint32_t)endpaddr,
+                 (unsigned long)baseaddr, (unsigned long)endpaddr,
                  (enum hex2bin_swap_e)swap);
 }
 
diff --git a/libs/libc/hex2bin/lib_hex2bin.c b/libs/libc/hex2bin/lib_hex2bin.c
index 9ddd7c722f..f9bd6bd2a0 100644
--- a/libs/libc/hex2bin/lib_hex2bin.c
+++ b/libs/libc/hex2bin/lib_hex2bin.c
@@ -378,18 +378,18 @@ static inline void writedata(FAR struct lib_sostream_s *outstream,
  ****************************************************************************/
 
 int hex2bin(FAR struct lib_instream_s *instream,
-            FAR struct lib_sostream_s *outstream, uint32_t baseaddr,
-            uint32_t endpaddr, enum hex2bin_swap_e swap)
+            FAR struct lib_sostream_s *outstream, unsigned long baseaddr,
+            unsigned long endpaddr, enum hex2bin_swap_e swap)
 {
   FAR uint8_t *alloc;
   FAR uint8_t *line;
   FAR uint8_t *bin;
   int nbytes;
   int bytecount;
-  uint32_t address;
-  uint32_t endaddr;
-  uint32_t expected;
-  uint32_t extension;
+  unsigned long address;
+  unsigned long endaddr;
+  unsigned long expected;
+  unsigned long extension;
   uint16_t address16;
   uint8_t checksum;
   unsigned int lineno;
@@ -546,7 +546,7 @@ int hex2bin(FAR struct lib_instream_s *instream,
 
             /* Get and verify the full 32-bit address */
 
-            address = extension + (uint32_t)address16;
+            address = extension + (unsigned long)address16;
             endaddr = address + bytecount;
 
             if (address < baseaddr || (endpaddr != 0 && endaddr >= endpaddr))
@@ -621,7 +621,7 @@ int hex2bin(FAR struct lib_instream_s *instream,
               goto errout_with_einval;
             }
 
-          extension = (uint32_t)bin[DATA_BINNDX] << 12;
+          extension = (unsigned long)bin[DATA_BINNDX] << 12;
           break;
 
         case RECORD_START_SEGADDR: /* Start segment address record */
@@ -654,8 +654,8 @@ int hex2bin(FAR struct lib_instream_s *instream,
               goto errout_with_einval;
             }
 
-          extension = (uint32_t)bin[DATA_BINNDX] << 24 |
-                      (uint32_t)bin[DATA_BINNDX + 1] << 16;
+          extension = (unsigned long)bin[DATA_BINNDX] << 24 |
+                      (unsigned long)bin[DATA_BINNDX + 1] << 16;
           break;
 
         case RECORD_START_LINADDR: /* Start linear address record */
diff --git a/libs/libc/hex2bin/lib_hex2mem.c b/libs/libc/hex2bin/lib_hex2mem.c
index 628ca5201e..5ca10b3494 100644
--- a/libs/libc/hex2bin/lib_hex2mem.c
+++ b/libs/libc/hex2bin/lib_hex2mem.c
@@ -60,7 +60,7 @@
  *
  ****************************************************************************/
 
-int hex2mem(int fd, uint32_t baseaddr, uint32_t endpaddr,
+int hex2mem(int fd, unsigned long baseaddr, unsigned long endpaddr,
             enum hex2bin_swap_e swap)
 {
   struct lib_rawinstream_s rawinstream;
@@ -81,7 +81,7 @@ int hex2mem(int fd, uint32_t baseaddr, uint32_t endpaddr,
   /* And do the deed */
 
   return hex2bin(&rawinstream.public, &memoutstream.public,
-                 (uint32_t)baseaddr, (uint32_t)endpaddr,
+                 (unsigned long)baseaddr, (unsigned long)endpaddr,
                  (enum hex2bin_swap_e)swap);
 }