diff --git a/Libraries/LibC/stddef.h b/Libraries/LibC/stddef.h
index 73f82c1489..e8d5c8fbde 100644
--- a/Libraries/LibC/stddef.h
+++ b/Libraries/LibC/stddef.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#ifndef KERNEL
+
 #include <sys/cdefs.h>
 #include <sys/types.h>
 
@@ -11,3 +13,5 @@
 
 typedef __PTRDIFF_TYPE__ ptrdiff_t;
 typedef __SIZE_TYPE__ size_t;
+
+#endif