diff --git a/core/math/math.factor b/core/math/math.factor
index 533295b6fc..83400a7858 100644
--- a/core/math/math.factor
+++ b/core/math/math.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2003, 2009 Slava Pestov, Joe Groff.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: kernel math.private ;
+USING: kernel ;
 IN: math
 
 GENERIC: >fixnum ( x -- n ) foldable