diff --git a/extra/math/factorials/factorials.factor b/extra/math/factorials/factorials.factor
index df025dde5c..957a94fd9d 100644
--- a/extra/math/factorials/factorials.factor
+++ b/extra/math/factorials/factorials.factor
@@ -1,8 +1,8 @@
 ! Copyright (C) 2013 John Benediktsson
 ! See http://factorcode.org/license.txt for BSD license
 
-USING: combinators combinators.short-circuit kernel locals math
-math.functions math.ranges memoize sequences ;
+USING: combinators kernel math math.functions math.ranges
+memoize sequences ;
 
 IN: math.factorials