diff --git a/extra/automata/automata.factor b/extra/automata/automata.factor
index 732033fb75..cd799d477e 100644
--- a/extra/automata/automata.factor
+++ b/extra/automata/automata.factor
@@ -1,6 +1,6 @@
 
 USING: kernel math math.parser random arrays hashtables assocs sequences
-       vars strings.lib ;
+       vars ;
 
 IN: automata
 
@@ -108,4 +108,4 @@ last-line> height> [ drop step-capped-line dup ] map >bitmap >last-line ;
 
 ! : start-loop ( -- ) t >loop-flag [ loop ] in-thread ;
 
-! : stop-loop ( -- ) f >loop-flag ;
\ No newline at end of file
+! : stop-loop ( -- ) f >loop-flag ;