diff --git a/data/helpers.d/setting b/data/helpers.d/setting
index 18a57780a..ccd2ac0a6 100644
--- a/data/helpers.d/setting
+++ b/data/helpers.d/setting
@@ -75,9 +75,11 @@ else:
     if action == "delete":
         if key in settings:
             del settings[key]
-    else:
+    elif action == "get":
         if key in ['redirected_urls', 'redirected_regex']:
             value = yaml.load(value)
+    else:
+        raise ValueError("action should either be get, set or delete")
     settings[key] = value
     with open(setting_file, "w") as f:
         yaml.safe_dump(settings, f, default_flow_style=False)