diff --git a/noid.py b/noid.py
index ea8809c..e992626 100644
--- a/noid.py
+++ b/noid.py
@@ -120,6 +120,9 @@ class Minter(Persistent):
         # 8. return s
         return ""
 
+    def _checkbar(self, id):
+        pass
+
 
 if __name__ == "__main__":
     pass