diff -r 164ed9bf157c -r 21d35cf4933e hgkw/keyword.py
--- a/hgkw/keyword.py	Sun Nov 17 10:59:35 2013 -0500
+++ b/hgkw/keyword.py	Thu Nov 28 12:57:12 2013 +0000
@@ -438,7 +438,11 @@
     repo[None].add([fn])
     ui.note(_('\nkeywords written to %s:\n') % fn)
     ui.note(keywords)
-    repo.dirstate.setbranch('demobranch')
+    wlock = repo.wlock()
+    try:
+        repo.dirstate.setbranch('demobranch')
+    finally:
+        wlock.release()
     for name, cmd in ui.configitems('hooks'):
         if name.split('.', 1)[0].find('commit') > -1:
             repo.ui.setconfig('hooks', name, '')