--- a/mercurial/filelog.py
+++ b/mercurial/filelog.py
@@ -71,7 +71,7 @@ class filelog(revlog):
# for renames, we have to go the slow way
if self.renamed(node):
t2 = self.read(node)
- return t2 == text
+ return t2 != text
return revlog.cmp(self, node, text)