diff --git a/extra/lisp/lisp-tests.factor b/extra/lisp/lisp-tests.factor
index 101af3fa5b..ec376569f0 100644
--- a/extra/lisp/lisp-tests.factor
+++ b/extra/lisp/lisp-tests.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008 James Cash
 ! See http://factorcode.org/license.txt for BSD license.
-USING: lisp lisp.parser tools.test ;
+USING: lisp lisp.parser tools.test sequences math kernel ;
 
 IN: lisp.test