diff --git a/asterisk_click2dial/asterisk_click2dial.py b/asterisk_click2dial/asterisk_click2dial.py
index 334cfb1..ba95b43 100644
--- a/asterisk_click2dial/asterisk_click2dial.py
+++ b/asterisk_click2dial/asterisk_click2dial.py
@@ -644,11 +644,14 @@ class wizard_open_calling_partner(osv.osv_memory):
 
 
     def onchange_to_update_partner_address(self, cr, uid, ids, to_update_partner_address_id, context=None):
-        to_update_partner_address = self.pool.get('res.partner.address').browse(cr, uid, to_update_partner_address_id, context=context)
         res = {}
         res['value'] = {}
-        res['value'].update({'current_phone': to_update_partner_address.phone,
-            'current_mobile': to_update_partner_address.mobile})
+        if to_update_partner_address_id:
+            to_update_partner_address = self.pool.get('res.partner.address').browse(cr, uid, to_update_partner_address_id, context=context)
+            res['value'].update({'current_phone': to_update_partner_address.phone,
+                'current_mobile': to_update_partner_address.mobile})
+        else:
+            res['value'].update({'current_phone': False, 'current_mobile': False})
         return res
 
 wizard_open_calling_partner()
diff --git a/asterisk_click2dial/i18n/asterisk_click2dial.pot b/asterisk_click2dial/i18n/asterisk_click2dial.pot
index 6c9c9c9..bbec3fb 100644
--- a/asterisk_click2dial/i18n/asterisk_click2dial.pot
+++ b/asterisk_click2dial/i18n/asterisk_click2dial.pot
@@ -406,8 +406,8 @@ msgstr "Set a user-specific Alert-Info header in SIP request to user's IP Phone
 
 #. module: asterisk_click2dial
 #: view:wizard.open.calling.partner:0
-msgid "With calling number as mobile"
-msgstr "With calling number as mobile"
+msgid "with calling number as mobile"
+msgstr "with calling number as mobile"
 
 #. module: asterisk_click2dial
 #: field:wizard.open.calling.partner,partner_address_id:0
diff --git a/asterisk_click2dial/i18n/fr.po b/asterisk_click2dial/i18n/fr.po
index 360aa8e..c50bfd2 100644
--- a/asterisk_click2dial/i18n/fr.po
+++ b/asterisk_click2dial/i18n/fr.po
@@ -406,7 +406,7 @@ msgstr "Set a user-specific Alert-Info header in SIP request to user's IP Phone
 
 #. module: asterisk_click2dial
 #: view:wizard.open.calling.partner:0
-msgid "With calling number as mobile"
+msgid "with calling number as mobile"
 msgstr "avec le numéro appelant comme portable"
 
 #. module: asterisk_click2dial
diff --git a/asterisk_click2dial/res_partner_view.xml b/asterisk_click2dial/res_partner_view.xml
index 4aadd16..e8702cb 100644
--- a/asterisk_click2dial/res_partner_view.xml
+++ b/asterisk_click2dial/res_partner_view.xml
@@ -108,7 +108,7 @@
                 <label string="No partner contact found in OpenERP with this number" colspan="8" />
                 <separator string="Create a new contact" colspan="8" />
                 <button name="create_partner_address_phone" icon="gtk-new" string="with calling number as phone" type="object" colspan="4"/>
-                <button name="create_partner_address_mobile" icon="gtk-new" string="With calling number as mobile" type="object" colspan="4"/>
+                <button name="create_partner_address_mobile" icon="gtk-new" string="with calling number as mobile" type="object" colspan="4"/>
                 <newline />
 
                 <separator string="Update an existing contact" colspan="8" />