diff --git a/basis/unix/linux/inotify/inotify.factor b/basis/unix/linux/inotify/inotify.factor
index e3d40b5b28..9084b41c50 100644
--- a/basis/unix/linux/inotify/inotify.factor
+++ b/basis/unix/linux/inotify/inotify.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien.syntax math math.bitwise ;
+USING: alien.syntax math math.bitwise constants ;
 IN: unix.linux.inotify
 
 C-STRUCT: inotify-event