diff --git a/extra/sequences/extras/extras.factor b/extra/sequences/extras/extras.factor
index 9e11975135..600c5cb581 100644
--- a/extra/sequences/extras/extras.factor
+++ b/extra/sequences/extras/extras.factor
@@ -259,9 +259,6 @@ PRIVATE>
 : harvest! ( seq -- newseq )
     [ empty? not ] filter! ;
 
-: contains? ( seq elts -- ? )
-    [ member? ] curry any? ; inline
-
 : head-as ( seq n exemplar -- seq' )
     [ head-slice ] [ like ] bi* ; inline