diff --git a/addons/project/project.py b/addons/project/project.py
index f6bd55c2fb6..96b1c84b94c 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -1202,8 +1202,8 @@ class account_analytic_account(osv.osv):
         'company_uom_id': fields.related('company_id', 'project_time_mode_id', type='many2one', relation='product.uom'),
     }
 
-    def on_change_template(self, cr, uid, ids, template_id, context=None):
-        res = super(account_analytic_account, self).on_change_template(cr, uid, ids, template_id, context=context)
+    def on_change_template(self, cr, uid, ids, template_id, date_start=False, context=None):
+        res = super(account_analytic_account, self).on_change_template(cr, uid, ids, template_id, date_start=date_start, context=context)
         if template_id and 'value' in res:
             template = self.browse(cr, uid, template_id, context=context)
             res['value']['use_tasks'] = template.use_tasks
diff --git a/addons/project_issue/project_issue.py b/addons/project_issue/project_issue.py
index 6f072f5abd1..84abc33a7e6 100644
--- a/addons/project_issue/project_issue.py
+++ b/addons/project_issue/project_issue.py
@@ -530,8 +530,8 @@ class account_analytic_account(osv.Model):
         'use_issues': fields.boolean('Issues', help="Check this field if this project manages issues"),
     }
 
-    def on_change_template(self, cr, uid, ids, template_id, context=None):
-        res = super(account_analytic_account, self).on_change_template(cr, uid, ids, template_id, context=context)
+    def on_change_template(self, cr, uid, ids, template_id, date_start=False, context=None):
+        res = super(account_analytic_account, self).on_change_template(cr, uid, ids, template_id, date_start=date_start, context=context)
         if template_id and 'value' in res:
             template = self.browse(cr, uid, template_id, context=context)
             res['value']['use_issues'] = template.use_issues
diff --git a/addons/project_long_term/project_long_term.py b/addons/project_long_term/project_long_term.py
index a950907fb69..29e94591094 100644
--- a/addons/project_long_term/project_long_term.py
+++ b/addons/project_long_term/project_long_term.py
@@ -273,8 +273,8 @@ class account_analytic_account(osv.osv):
         'use_phases': fields.boolean('Phases', help="Check this field if you plan to use phase-based scheduling"),
     }
 
-    def on_change_template(self, cr, uid, ids, template_id, context=None):
-        res = super(account_analytic_account, self).on_change_template(cr, uid, ids, template_id, context=context)
+    def on_change_template(self, cr, uid, ids, template_id, date_start=False, context=None):
+        res = super(account_analytic_account, self).on_change_template(cr, uid, ids, template_id, date_start=date_start, context=context)
         if template_id and 'value' in res:
             template = self.browse(cr, uid, template_id, context=context)
             res['value']['use_phases'] = template.use_phases