diff --git a/addons/crm/crm.py b/addons/crm/crm.py
index f6661b4651a..a9feff678b2 100644
--- a/addons/crm/crm.py
+++ b/addons/crm/crm.py
@@ -347,8 +347,8 @@ class crm_case(osv.osv):
         'date_closed': fields.datetime('Closed', readonly=True),
         'canal_id': fields.many2one('res.partner.canal', 'Channel'),
         'user_id': fields.many2one('res.users', 'Responsible'),
-        'history_line': fields.one2many('crm.case.history', 'case_id', 'Communication'),
-        'log_ids': fields.one2many('crm.case.log', 'case_id', 'Logs History'),
+        'history_line': fields.one2many('crm.case.history', 'case_id', 'Communication', readonly=1),
+        'log_ids': fields.one2many('crm.case.log', 'case_id', 'Logs History', readonly=1),
         'state': fields.selection(AVAILABLE_STATES, 'Status', size=16, readonly=True),
         'ref' : fields.reference('Reference', selection=_links_get, size=128),
         'ref2' : fields.reference('Reference 2', selection=_links_get, size=128),