diff --git a/bin/addons/base/ir/ir_rule.py b/bin/addons/base/ir/ir_rule.py
index d3178616435..b2e0a4b18f0 100644
--- a/bin/addons/base/ir/ir_rule.py
+++ b/bin/addons/base/ir/ir_rule.py
@@ -152,10 +152,10 @@ class ir_rule(osv.osv):
 				JOIN (ir_rule_group g
 					JOIN ir_model m ON (g.model_id = m.id))
 					ON (g.id = r.rule_group)
-				WHERE m.model = %s
+				WHERE m.model = '%s'
 				AND (g.id IN (SELECT rule_group_id FROM group_rule_group_rel g_rel
 							JOIN res_groups_users_rel u_rel ON (g_rel.group_id = u_rel.gid)
-							WHERE u_rel.uid = %d) OR g.global)""", (model_name, uid, uid))
+							WHERE u_rel.uid = %d) OR g.global)""", (model_name, uid))
 		ids = map(lambda x:x[0], cr.fetchall())
 		if not ids:
 			return '', []