diff --git a/party.py b/party.py
index bd59904..cd3f7d8 100644
--- a/party.py
+++ b/party.py
@@ -80,9 +80,10 @@ class Party(metaclass=PoolMeta):
 
         super(Party, cls).delete(parties)
 
-        cursor.execute(*party_company.delete(
-            where=(party_company.party.in_(party_ids))
-            ))
+        if party_ids:
+            cursor.execute(*party_company.delete(
+                where=(party_company.party.in_(party_ids))
+                ))
 
     def get_current_company(self, name):
         pool = Pool()