diff --git a/addons/crm/wizard/crm_forward_to_partner.py b/addons/crm/wizard/crm_forward_to_partner.py
index a942b79380b..2bd8aebe9c3 100644
--- a/addons/crm/wizard/crm_forward_to_partner.py
+++ b/addons/crm/wizard/crm_forward_to_partner.py
@@ -187,12 +187,14 @@ class crm_lead_forward_to_partner(osv.osv_memory):
         email_re = r'([^ ,<@]+@[^> ,]+)'
         email_cc = re.findall(email_re, case.email_cc or '')
         new_cc = []
+        if case.email_cc:
+            new_cc.append(case.email_cc)
         for to in this.email_to.split(','):
             email_to = re.findall(email_re, to)
             email_to = email_to and email_to[0] or ''
             if email_to not in email_cc:
                 new_cc.append(to)
-        to_write.update({'email_cc' : case.email_cc or '' + ','.join(new_cc)})
+        to_write.update({'email_cc' : ', '.join(new_cc) })
         case_pool.write(cr, uid, case.id, to_write, context=context)
 
         return {}