diff --git a/Tools/hg/hgtouch.py b/Tools/hg/hgtouch.py
index cd990b326d1..119d8121482 100644
--- a/Tools/hg/hgtouch.py
+++ b/Tools/hg/hgtouch.py
@@ -125,6 +125,6 @@ def touch(ui, repo, basedir):
 
 cmdtable = {
     "touch": (touch,
-              [('b', 'basedir', '', 'base dir of the tree to apply touching', 'BASEDIR')],
+              [('b', 'basedir', '', 'base dir of the tree to apply touching')],
               "hg touch [-b BASEDIR]")
 }