diff --git a/src/middlewared/middlewared/plugins/system_vendor/vendor.py b/src/middlewared/middlewared/plugins/system_vendor/vendor.py
index 81324e41a7b49..bca773e2db2dc 100644
--- a/src/middlewared/middlewared/plugins/system_vendor/vendor.py
+++ b/src/middlewared/middlewared/plugins/system_vendor/vendor.py
@@ -35,3 +35,5 @@ def unvendor(self):
             pass
         except Exception:
             self.logger.exception('Unexpected error attempting to remove %r', SENTINEL_FILE_PATH)
+
+        self.middleware.call_sync('etc.generate', 'grub')