diff --git a/extra/fjsc/fjsc.factor b/extra/fjsc/fjsc.factor
index 5b5900f0bc..3811949c1d 100755
--- a/extra/fjsc/fjsc.factor
+++ b/extra/fjsc/fjsc.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel peg strings promises sequences math math.parser
        namespaces words quotations arrays hashtables io
-       io.streams.string assocs memoize ascii ;
+       io.streams.string assocs memoize ascii peg.parsers ;
 IN: fjsc
 
 TUPLE: ast-number value ;