diff --git a/mercurial/repair.py b/mercurial/repair.py
--- a/mercurial/repair.py
+++ b/mercurial/repair.py
@@ -22,9 +22,7 @@ from . import (
 
 def _bundle(repo, bases, heads, node, suffix, compress=True):
     """create a bundle with the specified revisions as a backup"""
-    cgversion = '01'
-    if 'generaldelta' in repo.requirements:
-        cgversion = '02'
+    cgversion = changegroup.safeversion(repo)
 
     cg = changegroup.changegroupsubset(repo, bases, heads, 'strip',
                                        version=cgversion)
diff --git a/tests/test-treemanifest.t b/tests/test-treemanifest.t
--- a/tests/test-treemanifest.t
+++ b/tests/test-treemanifest.t
@@ -285,6 +285,17 @@ Turning off treemanifest config has no e
        1       127     111      0       5 25ecb8cb8618 000000000000 000000000000
        2       238      55      1       6 5b16163a30c6 25ecb8cb8618 000000000000
 
+Stripping and recovering changes should work
+
+  $ hg st --change tip
+  M dir1/a
+  $ hg --config extensions.strip= strip tip
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  saved backup bundle to $TESTTMP/repo-mixed/.hg/strip-backup/51cfd7b1e13b-78a2f3ed-backup.hg (glob)
+  $ hg unbundle -q .hg/strip-backup/*
+  $ hg st --change tip
+  M dir1/a
+
 Create deeper repo with tree manifests.
 
   $ cd ..