diff --git a/openerp/sql_db.py b/openerp/sql_db.py
index 39c87049fb0..8571b3ba08f 100644
--- a/openerp/sql_db.py
+++ b/openerp/sql_db.py
@@ -255,7 +255,7 @@ class Cursor(object):
     def split_for_in_conditions(self, ids):
         """Split a list of identifiers into one or more smaller tuples
            safe for IN conditions, after uniquifying them."""
-        return tools.misc.split_every(self.IN_MAX, set(ids))
+        return tools.misc.split_every(self.IN_MAX, ids)
 
     def print_log(self):
         global sql_counter