diff --git a/include/libopenstm32/common.h b/include/libopenstm32/common.h
index aa57cf19..fe67eb1e 100644
--- a/include/libopenstm32/common.h
+++ b/include/libopenstm32/common.h
@@ -22,13 +22,13 @@
 
 #include <libopenstm32.h>
 
-/* Type definitions */
-typedef signed char s8;
-typedef signed short s16;
-typedef signed long s32;
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned long u32;
+/* Type definitions for shorter and nicer code */
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
 
 /* Generic memory-mapped I/O accessor functions */
 #define MMIO8(addr)		(*(volatile u8 *)(addr))