diff --git a/hgext/convert/hg.py b/hgext/convert/hg.py
--- a/hgext/convert/hg.py
+++ b/hgext/convert/hg.py
@@ -27,8 +27,8 @@ class mercurial_sink(converter_sink):
         self.branchnames = ui.configbool('convert', 'hg.usebranchnames', True)
 
     def before(self):
+        self.wlock = self.repo.wlock()
         self.lock = self.repo.lock()
-        self.wlock = self.repo.wlock()
 
     def after(self):
         self.lock = None