Index: uspace/lib/c/include/unistd.h
===================================================================
--- uspace/lib/c/include/unistd.h	(revision 46d4d9f449e7933280b1877c70448602ec0ab0ae)
+++ uspace/lib/c/include/unistd.h	(revision 0ca16307b0312b15580d8a318b41edece7b6eed9)
@@ -41,5 +41,5 @@
 
 #ifndef NULL
-	#define NULL  0UL
+	#define NULL	((void *) 0)
 #endif