diff --git a/BaS_gcc/include/bas_printf.h b/BaS_gcc/include/bas_printf.h
index f968588..c11a655 100644
--- a/BaS_gcc/include/bas_printf.h
+++ b/BaS_gcc/include/bas_printf.h
@@ -20,7 +20,7 @@
 #ifndef _BAS_PRINTF_H_
 #define _BAS_PRINTF_H_
 #include <stdarg.h>
-typedef uint32_t size_t;
+#include <stddef.h>
 
 extern void xvsnprintf(char *str, size_t size, const char *fmt, va_list va);
 extern void xvprintf(const char *fmt, va_list va);