diff --git a/hgext/git/__init__.py b/hgext/git/__init__.py
--- a/hgext/git/__init__.py
+++ b/hgext/git/__init__.py
@@ -19,6 +19,7 @@
     localrepo,
     pycompat,
     store,
+    util,
 )
 
 from . import (
@@ -222,7 +223,7 @@
 
 
 def reposetup(ui, repo):
-    if isinstance(repo.store, gitstore):
+    if util.safehasattr(repo, 'store') and isinstance(repo.store, gitstore):
         orig = repo.__class__
         repo.store._progress_factory = repo.ui.makeprogress