diff --git a/hgext/uncommit.py b/hgext/uncommit.py
--- a/hgext/uncommit.py
+++ b/hgext/uncommit.py
@@ -100,8 +100,9 @@
     return repo.commitctx(new)
 
 def _fixdirstate(repo, oldctx, newctx, match=None):
-    """ fix the dirstate after switching the working directory from oldctx to
-    newctx which can be result of either unamend or uncommit.
+    """Fix the dirstate after switching the working directory from
+    oldctx to newctx not containing changed files matched by
+    match. Works for both unamend or uncommit.
     """
     ds = repo.dirstate
     ds.setparents(newctx.node(), node.nullid)