diff --git a/project.py b/project.py
index 114ff49..66a123d 100644
--- a/project.py
+++ b/project.py
@@ -2181,7 +2181,7 @@
     syncbuf.Finish()
 
     return GitCommand(self,
-                        ['branch', '-D', 'default'],
+                        ['update-ref', '-d', 'refs/heads/default'],
                         capture_stdout = True,
                         capture_stderr = True).Wait() == 0