diff --git a/basis/regexp/backend/backend.factor b/basis/regexp/backend/backend.factor
index 1a261fb0af..75a010b705 100644
--- a/basis/regexp/backend/backend.factor
+++ b/basis/regexp/backend/backend.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors hashtables kernel math state-tables vars vectors ;
+USING: accessors hashtables kernel math state-tables vectors ;
 IN: regexp.backend
 
 TUPLE: regexp