--- a/hgext/convert/convcmd.py	Sat Aug 15 17:50:59 2015 +0900
+++ b/hgext/convert/convcmd.py	Sat Aug 15 13:44:55 2015 -0700
@@ -120,6 +120,9 @@
                          item=file, total=self.filecount)
         return self.source.getfile(file, rev)
 
+    def targetfilebelongstosource(self, targetfilename):
+        return self.source.targetfilebelongstosource(targetfilename)
+
     def lookuprev(self, rev):
         return self.source.lookuprev(rev)