diff --git a/include/global.h b/include/global.h
index d8547d9c37..8860b4ae39 100644
--- a/include/global.h
+++ b/include/global.h
@@ -12,8 +12,10 @@
 #define asm_unified(x) asm(".syntax unified\n" x "\n.syntax divided")
 
 #if defined (__APPLE__) || defined (__CYGWIN__)
-void memset(void *, int, size_t);
-void memcpy(void *, const void *, size_t);
+void *memset(void *, int, size_t);
+void *memcpy(void *, const void *, size_t);
+int strcmp(const char *s1, const char *s2);
+char* strcpy(char *dst0, const char *src0);
 #endif // __APPLE__
 
 #define ARRAY_COUNT(array) (sizeof(array) / sizeof((array)[0]))