Index: uspace/lib/c/include/stddef.h
===================================================================
--- uspace/lib/c/include/stddef.h	(revision 9b3f77caf735cbb001a4f81f1d9cebabfb684dd7)
+++ uspace/lib/c/include/stddef.h	(revision 101e305041bfb2661823ca537f5a375b676556e8)
@@ -38,4 +38,9 @@
 #include <sys/types.h>
 
+#ifndef NULL
+	#define NULL  ((void *) 0)
+#endif
+
+
 #endif