diff --git a/collects/mzlib/string.ss b/collects/mzlib/string.ss
index 6bb6dfa811..47c18df911 100644
--- a/collects/mzlib/string.ss
+++ b/collects/mzlib/string.ss
@@ -13,7 +13,8 @@
 	   regexp-match-peek-positions*
 	   regexp-split
 	   regexp-match-exact?
-           regexp-match/fail-without-reading)
+           regexp-match/fail-without-reading
+           glob->regexp)
 
   (require (lib "etc.ss"))