--- a/src/pyams_catalog/query.py	Thu Oct 08 09:48:45 2015 +0200
+++ b/src/pyams_catalog/query.py	Thu Oct 08 09:50:48 2015 +0200
@@ -31,10 +31,10 @@
         self.intids = query_utility(IIntIds)
 
     def __iter__(self):
-        query = self.query
         intids = self.intids
         if intids is None:
             raise StopIteration
+        query = self.query
         if isinstance(query, Query):
             query = query.execute()
         if isinstance(query, tuple):