diff --git a/src/paperless_mail/mail.py b/src/paperless_mail/mail.py
index a4a25fa0a..1014e4035 100644
--- a/src/paperless_mail/mail.py
+++ b/src/paperless_mail/mail.py
@@ -381,7 +381,7 @@ def make_criterias(rule):
 
     rule_query = get_rule_action(rule).get_criteria()
     if isinstance(rule_query, dict):
-        if len(rule_query) != 0 or len(criterias) != 0:
+        if len(rule_query) or len(criterias):
             return AND(**rule_query, **criterias)
     else:
         return AND(rule_query, **criterias)