--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -220,10 +220,10 @@ def merge(repo, node, force=None, remind
return _merge.update(repo, node, branchmerge=True, forcemerge=force,
remind=remind, wlock=wlock)
-def revert(repo, node, choose):
+def revert(repo, node, choose, wlock):
"""revert changes to revision in node without updating dirstate"""
return _merge.update(repo, node, force=True, partial=choose,
- show_stats=False)
+ show_stats=False, wlock=wlock)
def verify(repo):
"""verify the consistency of a repository"""