diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -6475,7 +6475,7 @@ def unbundle(ui, repo, fname1, *fnames, 
                 finally:
                     if tr:
                         tr.release()
-                changes = [r.get('result', 0)
+                changes = [r.get('return', 0)
                            for r in op.records['changegroup']]
                 modheads = changegroup.combineresults(changes)
             else:
diff --git a/tests/test-bundle2-format.t b/tests/test-bundle2-format.t
--- a/tests/test-bundle2-format.t
+++ b/tests/test-bundle2-format.t
@@ -997,6 +997,7 @@ Support for changegroup
   adding manifests
   adding file changes
   added 0 changesets with 0 changes to 3 files
+  (run 'hg update' to get a working copy)
 
 with reply
 
@@ -1125,6 +1126,7 @@ Simple case where it just work: GZ
   adding manifests
   adding file changes
   added 0 changesets with 0 changes to 3 files
+  (run 'hg update' to get a working copy)
 Simple case where it just work: BZ
 ----------------------------------
 
@@ -1211,6 +1213,7 @@ Simple case where it just work: BZ
   adding manifests
   adding file changes
   added 0 changesets with 0 changes to 3 files
+  (run 'hg update' to get a working copy)
 
 unknown compression while unbundling
 -----------------------------