diff --git a/pagure/lib/__init__.py b/pagure/lib/__init__.py
index 1064c22..6b13444 100644
--- a/pagure/lib/__init__.py
+++ b/pagure/lib/__init__.py
@@ -816,6 +816,8 @@ def update_project_settings(session, repo, settings, user):
         if key in settings:
             if new_settings[key] != settings[key]:
                 update.append(key)
+                if key == 'Minimum_score_to_merge_pull-request':
+                    settings[key] = settings[key] or -1
                 new_settings[key] = settings[key]
         else:
             update.append(key)