diff --git a/include/stdlib.h b/include/stdlib.h
index 7a191a3d9..dab0246c0 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -26,7 +26,7 @@
 void* malloc (size_t size);
 void* calloc (size_t count, size_t size);
 void* realloc (void* block, size_t size);
-void free (void* block);
+void __fastcall__ free (void* block);
 #ifndef __STRICT_ANSI__
 void _hadd (void* mem, size_t size);		/* Non-standard */
 #endif