diff --git a/mercurial/repair.py b/mercurial/repair.py
--- a/mercurial/repair.py
+++ b/mercurial/repair.py
@@ -875,8 +875,8 @@ def _upgraderepo(ui, srcrepo, dstrepo, r
             continue
 
         srcrepo.ui.write(_('copying %s\n') % p)
-        src = srcrepo.store.vfs.join(p)
-        dst = dstrepo.store.vfs.join(p)
+        src = srcrepo.store.rawvfs.join(p)
+        dst = dstrepo.store.rawvfs.join(p)
         util.copyfile(src, dst, copystat=True)
 
     _upgradefinishdatamigration(ui, srcrepo, dstrepo, requirements)
diff --git a/tests/test-upgrade-repo.t b/tests/test-upgrade-repo.t
--- a/tests/test-upgrade-repo.t
+++ b/tests/test-upgrade-repo.t
@@ -339,8 +339,16 @@ store files with special filenames aren'
   finished migrating 1 changelog revisions; change in size: 0 bytes
   finished migrating 3 total revisions; total change in store size: 0 bytes
   copying .XX_special_filename
+  copying phaseroots
+  data fully migrated to temporary repository
+  marking source repository as being upgraded; clients will be unable to read from repository
+  starting in-place swap of repository data
+  replaced files will be backed up at $TESTTMP/store-filenames/.hg/upgradebackup.* (glob)
+  replacing store...
+  store replacement complete; repository was inconsistent for *s (glob)
+  finalizing requirements file and making repository readable again
   removing temporary repository $TESTTMP/store-filenames/.hg/upgrade.* (glob)
-  abort: No such file or directory: $TESTTMP/store-filenames/.hg/store/~2e_x_x__special__filename
-  [255]
+  copy of old repository backed up at $TESTTMP/store-filenames/.hg/upgradebackup.* (glob)
+  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified
 
   $ cd ..