diff --git a/extra/sequences/lib/lib.factor b/extra/sequences/lib/lib.factor
index 15983329d6..6bc6c706cf 100755
--- a/extra/sequences/lib/lib.factor
+++ b/extra/sequences/lib/lib.factor
@@ -197,9 +197,6 @@ USE: continuations
     >r >r 0 max r> r>
     [ length tuck min >r min r> ] keep subseq ;
 
-: ?head* ( seq n -- seq/f ) (head) ?subseq ;
-: ?tail* ( seq n -- seq/f ) (tail) ?subseq ;
-
 : accumulator ( quot -- quot vec )
     V{ } clone [ [ push ] curry compose ] keep ; inline