diff --git a/addons/base_calendar/wizard/calendar_event_edit_all.py b/addons/base_calendar/wizard/calendar_event_edit_all.py
index 0a7fddadb2a..d13b6ef8b38 100644
--- a/addons/base_calendar/wizard/calendar_event_edit_all.py
+++ b/addons/base_calendar/wizard/calendar_event_edit_all.py
@@ -53,7 +53,7 @@ class calendar_event_edit_all(osv.osv_memory):
                 event = model_obj.read(cr, uid, context['active_id'], ['name', 'location', 'alarm_id'])
                 return event['date_deadline']
 
-    def _modify_this(self, cr, uid, ids, context=None):
+    def modify_this(self, cr, uid, ids, context=None):
         """
         Modify All event for Crm Meeting.
         @param cr: the current row, from the database cursor,
diff --git a/addons/base_calendar/wizard/calendar_event_edit_all_view.xml b/addons/base_calendar/wizard/calendar_event_edit_all_view.xml
index 15bd025441a..8e406c4d8b0 100644
--- a/addons/base_calendar/wizard/calendar_event_edit_all_view.xml
+++ b/addons/base_calendar/wizard/calendar_event_edit_all_view.xml
@@ -22,7 +22,7 @@
                        	<separator string="" colspan="4" />
                     <group colspan="4" col="6">
                     	<button  icon="gtk-cancel" special="cancel" string="Cancel"/>
-                    	<button  icon="gtk-save" string="_Save" name="_modify_this" type="object"/>
+                    	<button  icon="gtk-save" string="_Save" name="modify_this" type="object"/>
                    </group>
                </form>
             </field>