diff --git a/mercurial/exchange.py b/mercurial/exchange.py
--- a/mercurial/exchange.py
+++ b/mercurial/exchange.py
@@ -2101,7 +2101,7 @@
         dheads = []
     unfi = pullop.repo.unfiltered()
     phase = unfi._phasecache.phase
-    rev = unfi.changelog.nodemap.get
+    rev = unfi.changelog.index.get_rev
     public = phases.public
     draft = phases.draft