diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -609,11 +609,12 @@ class localrepository(repo.repository):
                 try:
                     args = self.opener("undo.desc", "r").read().splitlines()
                     if len(args) >= 3 and self.ui.verbose:
-                        desc = _("rolling back %s (%s) to revision %s\n") % (
-                                 args[1], args[2], args[0])
+                        desc = _("rolling back to revision %s"
+                                 " (undo %s: %s)\n") % (
+                                 args[0], args[1], args[2])
                     elif len(args) >= 2:
-                        desc = _("rolling back %s to revision %s\n") % (
-                                 args[1], args[0])
+                        desc = _("rolling back to revision %s (undo %s)\n") % (
+                                 args[0], args[1])
                 except IOError:
                     desc = _("rolling back unknown transaction\n")
                 self.ui.status(desc)
diff --git a/tests/test-acl.out b/tests/test-acl.out
--- a/tests/test-acl.out
+++ b/tests/test-acl.out
@@ -71,7 +71,7 @@ adding quux/file.py revisions
 files: 3/3 chunks (100.00%)
 added 3 changesets with 3 changes to 3 files
 updating the branch cache
-rolling back push to revision 1
+rolling back to revision 1 (undo push)
 0:6675d58eff77
 
 Extension disabled for lack of acl.sources
@@ -143,7 +143,7 @@ added 3 changesets with 3 changes to 3 f
 calling hook pretxnchangegroup.acl: hgext.acl.hook
 acl: changes have source "push" - skipping
 updating the branch cache
-rolling back push to revision 1
+rolling back to revision 1 (undo push)
 0:6675d58eff77
 
 No [acl.allow]/[acl.deny]
@@ -221,7 +221,7 @@ acl: allowing changeset ef1ea85a6374
 acl: allowing changeset f9cafe1212c8
 acl: allowing changeset 911600dab2ae
 updating the branch cache
-rolling back push to revision 1
+rolling back to revision 1 (undo push)
 0:6675d58eff77
 
 Empty [acl.allow]
@@ -799,7 +799,7 @@ acl: allowing changeset ef1ea85a6374
 acl: allowing changeset f9cafe1212c8
 acl: allowing changeset 911600dab2ae
 updating the branch cache
-rolling back push to revision 1
+rolling back to revision 1 (undo push)
 0:6675d58eff77
 
 wilma can change files with a .txt extension
@@ -1160,6 +1160,6 @@ acl: allowing changeset ef1ea85a6374
 acl: allowing changeset f9cafe1212c8
 acl: allowing changeset 911600dab2ae
 updating the branch cache
-rolling back push to revision 1
+rolling back to revision 1 (undo push)
 0:6675d58eff77
 
diff --git a/tests/test-backout.out b/tests/test-backout.out
--- a/tests/test-backout.out
+++ b/tests/test-backout.out
@@ -62,7 +62,7 @@ abort: cannot use --parent on non-merge 
 # backout with valid parent should be ok
 removing d
 changeset 5:10e5328c8435 backs out changeset 4:b2f3bb92043e
-rolling back commit to revision 5
+rolling back to revision 5 (undo commit)
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 removing c
 changeset 5:033590168430 backs out changeset 4:b2f3bb92043e
diff --git a/tests/test-bundle-r.out b/tests/test-bundle-r.out
--- a/tests/test-bundle-r.out
+++ b/tests/test-bundle-r.out
@@ -154,7 +154,7 @@ checking manifests
 crosschecking files in changesets and manifests
 checking files
 4 files, 9 changesets, 7 total revisions
-rolling back pull to revision 5
+rolling back to revision 5 (undo pull)
 % should fail
 abort: --base is incompatible with specifying a destination
 abort: repository default-push not found!
@@ -187,7 +187,7 @@ checking manifests
 crosschecking files in changesets and manifests
 checking files
 4 files, 9 changesets, 7 total revisions
-rolling back unbundle to revision 3
+rolling back to revision 3 (undo unbundle)
 % 2
 2:d62976ca1e50
 adding changesets
@@ -202,7 +202,7 @@ checking manifests
 crosschecking files in changesets and manifests
 checking files
 2 files, 5 changesets, 5 total revisions
-rolling back unbundle to revision 3
+rolling back to revision 3 (undo unbundle)
 adding changesets
 adding manifests
 adding file changes
@@ -215,7 +215,7 @@ checking manifests
 crosschecking files in changesets and manifests
 checking files
 3 files, 7 changesets, 6 total revisions
-rolling back unbundle to revision 3
+rolling back to revision 3 (undo unbundle)
 adding changesets
 adding manifests
 adding file changes
diff --git a/tests/test-bundle.out b/tests/test-bundle.out
--- a/tests/test-bundle.out
+++ b/tests/test-bundle.out
@@ -37,7 +37,7 @@ adding file changes
 added 9 changesets with 7 changes to 4 files (+1 heads)
 (run 'hg heads' to see heads, 'hg merge' to merge)
 ====== Rollback empty
-rolling back pull to revision 0
+rolling back to revision 0 (undo pull)
 ====== Pull full.hg into empty again (using --cwd)
 pulling from ../full.hg
 requesting all changes
@@ -55,7 +55,7 @@ pulling from full.hg
 searching for changes
 no changes found
 ====== Rollback empty
-rolling back pull to revision 0
+rolling back to revision 0 (undo pull)
 ====== Pull full.hg into empty again (using -R)
 pulling from full.hg
 requesting all changes
@@ -123,7 +123,7 @@ adding file changes
 added 9 changesets with 7 changes to 4 files (+1 heads)
 (run 'hg heads' to see heads, 'hg merge' to merge)
 ====== Rollback empty
-rolling back pull to revision 0
+rolling back to revision 0 (undo pull)
 ====== Log -R bundle:empty+full.hg
 8 7 6 5 4 3 2 1 0 
 ====== Pull full.hg into empty again (using -R; with hook)
diff --git a/tests/test-convert-cvs.out b/tests/test-convert-cvs.out
--- a/tests/test-convert-cvs.out
+++ b/tests/test-convert-cvs.out
@@ -45,7 +45,7 @@ converting...
 2 Initial revision
 1 import
 filtering out empty revision
-rolling back commit to revision 1
+rolling back to revision 1 (undo commit)
 0 ci0
 updating tags
 c
diff --git a/tests/test-diff-color.out b/tests/test-diff-color.out
--- a/tests/test-diff-color.out
+++ b/tests/test-diff-color.out
@@ -43,7 +43,7 @@ examine changes to 'a'? [Ynsfdaq?]
  c
 record this change to 'a'? [Ynsfdaq?] 
 
-rolling back commit to revision 1
+rolling back to revision 1 (undo commit)
 % qrecord
 diff --git a/a b/a
 old mode 100644
diff --git a/tests/test-hook.out b/tests/test-hook.out
--- a/tests/test-hook.out
+++ b/tests/test-hook.out
@@ -101,7 +101,7 @@ adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 (run 'hg update' to get a working copy)
-rolling back pull to revision 4
+rolling back to revision 4 (undo pull)
 preoutgoing hook: HG_SOURCE=pull 
 preoutgoing.forbid hook: HG_SOURCE=pull 
 pulling from ../a
diff --git a/tests/test-import.out b/tests/test-import.out
--- a/tests/test-import.out
+++ b/tests/test-import.out
@@ -182,7 +182,7 @@ parent: 0
 applying ../patch1
 applying ../patch2
 applied 1d4bd90af0e4
-rolling back commit to revision 2
+rolling back to revision 2 (undo commit)
 parent: 1
 % hg import in a subdirectory
 requesting all changes
diff --git a/tests/test-keyword.out b/tests/test-keyword.out
--- a/tests/test-keyword.out
+++ b/tests/test-keyword.out
@@ -198,7 +198,7 @@ diff -r ef63ca68695b c
 +do not process $Id:
 +xxx $
 % rollback
-rolling back commit to revision 2
+rolling back to revision 2 (undo commit)
 % status
 A c
 % update -C
@@ -266,7 +266,7 @@ committed changeset 3:d14c712653769de926
 % status
 ? c
 % rollback
-rolling back commit to revision 3
+rolling back to revision 3 (undo commit)
 % status
 R a
 ? c
@@ -308,7 +308,7 @@ xxx $
 ignore $Id$
 
 % rollback
-rolling back commit to revision 3
+rolling back to revision 3 (undo commit)
 % clean update
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 % kwexpand/kwshrink on selected files
diff --git a/tests/test-newbranch.out b/tests/test-newbranch.out
--- a/tests/test-newbranch.out
+++ b/tests/test-newbranch.out
@@ -62,7 +62,7 @@ foo
 default
 bar
 % test for invalid branch cache
-rolling back commit to revision 5
+rolling back to revision 5 (undo commit)
 changeset:   4:4909a3732169
 branch:      foo
 tag:         tip
diff --git a/tests/test-notify.out b/tests/test-notify.out
--- a/tests/test-notify.out
+++ b/tests/test-notify.out
@@ -95,10 +95,10 @@ diff -r cb9a9f314b8b -r 0647d048b600 a
 +a
 (run 'hg update' to get a working copy)
 % fail for config file is missing
-rolling back pull to revision 1
+rolling back to revision 1 (undo pull)
 pull failed
 % pull
-rolling back pull to revision 1
+rolling back to revision 1 (undo pull)
 pulling from ../a
 searching for changes
 adding changesets
@@ -129,7 +129,7 @@ diff -r cb9a9f314b8b -r 0647d048b600 a
 +a
 (run 'hg update' to get a working copy)
 % pull
-rolling back pull to revision 1
+rolling back to revision 1 (undo pull)
 pulling from ../a
 searching for changes
 adding changesets
diff --git a/tests/test-pull-r.out b/tests/test-pull-r.out
--- a/tests/test-pull-r.out
+++ b/tests/test-pull-r.out
@@ -19,7 +19,7 @@ summary:     add foo
 abort: unknown revision 'missing'!
 % pull multiple revisions with update
 0:bbd179dfa0a7
-rolling back pull to revision 0
+rolling back to revision 0 (undo pull)
 % pull -r 0
 changeset:   0:bbd179dfa0a7
 tag:         tip
diff --git a/tests/test-push-http.out b/tests/test-push-http.out
--- a/tests/test-push-http.out
+++ b/tests/test-push-http.out
@@ -25,7 +25,7 @@ remote: adding file changes
 remote: added 1 changesets with 1 changes to 1 files
 % serve errors
 changegroup hook: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872 HG_SOURCE=serve HG_URL=remote:http 
-rolling back serve to revision 1
+rolling back to revision 1 (undo serve)
 % expect authorization error: all users denied
 abort: authorization failed
 pushing to http://localhost:$HGPORT/
diff --git a/tests/test-rename-after-merge.out b/tests/test-rename-after-merge.out
--- a/tests/test-rename-after-merge.out
+++ b/tests/test-rename-after-merge.out
@@ -34,7 +34,7 @@ 2 files updated, 0 files merged, 0 files
 (branch merge, don't forget to commit)
 % commit issue 1476
 copies:      c2 (c1)
-rolling back commit to revision 3
+rolling back to revision 3 (undo commit)
 2 files updated, 0 files merged, 2 files removed, 0 files unresolved
 % merge heads again
 2 files updated, 0 files merged, 0 files removed, 0 files unresolved
diff --git a/tests/test-rollback.out b/tests/test-rollback.out
--- a/tests/test-rollback.out
+++ b/tests/test-rollback.out
@@ -9,7 +9,7 @@ user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     test
 
-rolling back commit to revision 0
+rolling back to revision 0 (undo commit)
 checking changesets
 checking manifests
 crosschecking files in changesets and manifests
@@ -18,14 +18,14 @@ 0 files, 0 changesets, 0 total revisions
 A a
 % Test issue 902
 marked working directory as branch test
-rolling back commit to revision 0
+rolling back to revision 0 (undo commit)
 default
 % Test issue 1635 (commit message saved)
 .hg/last-message.txt:
 test2
 % Test rollback of hg before issue 902 was fixed
 marked working directory as branch test
-rolling back commit to revision 0
+rolling back to revision 0 (undo commit)
 Named branch could not be reset, current branch still is: test
 test
 % rollback by pretxncommit saves commit message (issue 1635)
diff --git a/tests/test-tags.out b/tests/test-tags.out
--- a/tests/test-tags.out
+++ b/tests/test-tags.out
@@ -111,7 +111,7 @@ date:        Thu Jan 01 00:00:00 1970 +0
 summary:     Removed tag bar
 
 % rollback undoes tag operation
-rolling back commit to revision 5
+rolling back to revision 5 (undo commit)
 tip                                4:0c192d7d5e6b
 bar                                1:78391a272241
 tip                                4:0c192d7d5e6b
diff --git a/tests/test-url-rev.out b/tests/test-url-rev.out
--- a/tests/test-url-rev.out
+++ b/tests/test-url-rev.out
@@ -75,7 +75,7 @@ summary:     add a
 
 
 % rolling back
-rolling back push to revision 2
+rolling back to revision 2 (undo push)
 % incoming
 2:faba9097cad4
 % pull
@@ -104,7 +104,7 @@ summary:     add a
 % no new revs, no update
 0:1f0dee641bb7
 % rollback
-rolling back pull to revision 2
+rolling back to revision 2 (undo pull)
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 0:1f0dee641bb7
 % pull -u takes us back to branch foo
@@ -116,7 +116,7 @@ date:        Thu Jan 01 00:00:00 1970 +0
 summary:     new head of branch foo
 
 % rollback
-rolling back pull to revision 2
+rolling back to revision 2 (undo pull)
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 % parents
 0:1f0dee641bb7