diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index b2d6702dc..8a5956ccf 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -7,11 +7,15 @@
 
 __BEGIN_DECLS
 
-#include <stddef.h>
 #include <limits.h>
 #include <math.h>
 #include <sys/wait.h>
 
+#define __need_NULL
+#define __need_size_t
+#define __need_wchar_t
+#include <stddef.h>
+
 #define EXIT_FAILURE 1
 #define EXIT_SUCCESS 0