diff --git a/synapse/storage/push_rule.py b/synapse/storage/push_rule.py
index ea865b6ab..bbf322cc8 100644
--- a/synapse/storage/push_rule.py
+++ b/synapse/storage/push_rule.py
@@ -63,7 +63,7 @@ class PushRuleStore(SQLBaseStore):
             {'user_name': user_name, 'rule_id': rule_id},
             ['enabled']
         )
-        if len(results) == 0:
+        if not results:
             defer.returnValue(True)
         defer.returnValue(results[0])