diff --git a/plugins/sieve.py b/plugins/sieve.py
index 305c1e3..108390e 100755
--- a/plugins/sieve.py
+++ b/plugins/sieve.py
@@ -37,6 +37,6 @@ def sieve_suite(bot, input, func, kind, args):
         admins = bot.config.get('admins', [])
 
         if input.host not in admins and input.nick not in admins:
-            return
+            return None
 
     return input