diff --git a/ansi/rope.rkt b/ansi/rope.rkt
index a872871..7fc6104 100644
--- a/ansi/rope.rkt
+++ b/ansi/rope.rkt
@@ -18,6 +18,7 @@
          rope-split
          rope-append
          rope-concat
+         subrope*
          subrope
 
          has-mark?