diff --git a/include/stddef.h b/include/stddef.h
index 07260dc..147949b 100755
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -15,10 +15,8 @@
 #undef NULL
 #define NULL (void *) 0
 
-#define __need_ptrdiff_t
-#define __need_size_t
-#define __need_wchar_t
-
-#include <sys/types.h>
+#include <types/ptrdiff_t.h>
+#include <types/size_t.h>
+#include <types/wchar_t.h>
 
 #endif