diff --git a/hgext/rebase.py b/hgext/rebase.py
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -813,7 +813,13 @@ def pullrebase(orig, ui, repo, *args, **
 def summaryhook(ui, repo):
     if not os.path.exists(repo.join('rebasestate')):
         return
-    state = restorestatus(repo)[2]
+    try:
+        state = restorestatus(repo)[2]
+    except error.RepoLookupError:
+        # i18n: column positioning for "hg summary"
+        msg = _('rebase: (use "hg rebase --abort" to clear broken state)\n')
+        ui.write(msg)
+        return
     numrebased = len([i for i in state.itervalues() if i != -1])
     # i18n: column positioning for "hg summary"
     ui.write(_('rebase: %s, %s (rebase --continue)\n') %
diff --git a/tests/test-rebase-abort.t b/tests/test-rebase-abort.t
--- a/tests/test-rebase-abort.t
+++ b/tests/test-rebase-abort.t
@@ -95,6 +95,8 @@ earlier than 2.7 by renaming ".hg/rebase
   abort: cannot continue inconsistent rebase
   (use "hg rebase --abort" to clear borken state)
   [255]
+  $ hg summary | grep '^rebase: '
+  rebase: (use "hg rebase --abort" to clear broken state)
   $ hg rebase --abort
   rebase aborted (no revision is removed, only broken state is cleared)