diff --git a/mercurial/changegroup.py b/mercurial/changegroup.py
--- a/mercurial/changegroup.py
+++ b/mercurial/changegroup.py
@@ -671,7 +671,7 @@
         # Ellipses serving mode.
         self._clrevtolocalrev.clear()
         if self._nextclrevtolocalrev:
-            self.clrevtolocalrev = self._nextclrevtolocalrev
+            self._clrevtolocalrev = self._nextclrevtolocalrev
             self._nextclrevtolocalrev.clear()
 
         return closechunk()