diff --git a/subcmds/sync.py b/subcmds/sync.py
index 9af1232..8050e51 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -102,8 +102,9 @@
       self._Fetch(*missing)
 
     for project in all:
-      if not project.Sync_LocalHalf():
-        sys.exit(1)
+      if project.worktree:
+        if not project.Sync_LocalHalf():
+          sys.exit(1)
 
 
 def _VerifyTag(project):