diff --git a/addons/crm/crm.py b/addons/crm/crm.py
index 7775e442df7..a2751310237 100644
--- a/addons/crm/crm.py
+++ b/addons/crm/crm.py
@@ -267,7 +267,7 @@ class crm_base(object):
             data = {'state': 'open', 'active': True}
             if not case.user_id:
                 data['user_id'] = uid
-            self.write(cr, uid, case.id, data)
+            self.write(cr, uid, [case.id], data)
 
         self._action(cr, uid, cases, 'open')
         return True
@@ -397,7 +397,7 @@ class crm_case(crm_base):
             data = {'state': 'open', 'active': True }
             if not case.user_id:
                 data['user_id'] = uid
-            self.write(cr, uid, case.id, data)
+            self.write(cr, uid, [case.id], data)
         self._action(cr, uid, cases, 'open')
         return True