diff --git a/hgext/git/gitlog.py b/hgext/git/gitlog.py
--- a/hgext/git/gitlog.py
+++ b/hgext/git/gitlog.py
@@ -218,7 +218,7 @@
             n = nodeorrev
         # handle looking up nullid
         if n == nullid:
-            return hgchangelog._changelogrevision(extra={})
+            return hgchangelog._changelogrevision(extra={}, manifest=nullid)
         hn = gitutil.togitnode(n)
         # We've got a real commit!
         files = [