diff --git a/userspace/libraries/LibC/include/sys/mman.h b/userspace/libraries/LibC/include/sys/mman.h
index c3cf4820..19420bee 100644
--- a/userspace/libraries/LibC/include/sys/mman.h
+++ b/userspace/libraries/LibC/include/sys/mman.h
@@ -16,6 +16,7 @@ __BEGIN_DECLS
 #define MAP_PRIVATE		0x02
 #define MAP_SHARED		0x04
 #define MAP_ANONYMOUS	0x08
+#define MAP_ANON		MAP_ANONYMOUS
 
 #define MS_ASYNC		0x01
 #define MS_INVALIDATE	0x02