diff --git a/kern/libkern/stddef.h b/kern/libkern/stddef.h
index ab8a2b5..0d70dea 100644
--- a/kern/libkern/stddef.h
+++ b/kern/libkern/stddef.h
@@ -2,8 +2,7 @@
 #define STDDEF_H
 
 #ifndef NULL
-#define NULL ((void*)0)
+#define NULL ((void *)0)
 #endif
 
 #endif // STDDEF_H
-