diff --git a/collects/mzlib/cmdline.ss b/collects/mzlib/cmdline.ss
index 4489308..e961824 100644
--- a/collects/mzlib/cmdline.ss
+++ b/collects/mzlib/cmdline.ss
@@ -3,3 +3,5 @@
 (require-library "cmdlineu.ss")
 
 (invoke-open-unit/sig mzlib:command-line@ #f)
+
+(require-library "cmdlinem.ss")