diff --git a/addons/project/project.py b/addons/project/project.py
index 62c1b34dbf9..1f4931d5e59 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -1305,7 +1305,24 @@ class task(base_stage, osv.osv):
             msg = _('Task has been <b>delegated</b> to <em>%s</em>.') % (task.user_id.name)
             self.message_post(cr, uid, [task.id], body=msg, context=context)
         return True
-
+   
+    def project_task_reevaluate(self, cr, uid, ids, context=None):
+        data = {}
+        cr.execute('SELECT max(id) FROM project_config_settings' )
+        res = cr.fetchone() 
+        setting_id = res and res[0] or None
+        if setting_id and setting_id != None:
+            config_id = self.pool.get('project.config.settings').browse(cr, uid, setting_id, context=context)
+            if config_id.group_time_work_estimation_tasks:
+                return {
+                    'view_type': 'form',
+                    "view_mode": 'form',
+                    'res_model': 'project.task.reevaluate',
+                    'type': 'ir.actions.act_window',
+                    'target': 'new',
+                    'context' : context
+                    }
+        return self.do_reopen(cr, uid, ids, context=context)
 
 class project_work(osv.osv):
     _name = "project.task.work"
diff --git a/addons/project/project_view.xml b/addons/project/project_view.xml
index ec29b19e97b..58f0ae17962 100644
--- a/addons/project/project_view.xml
+++ b/addons/project/project_view.xml
@@ -392,7 +392,7 @@
                         <button name="do_draft" string="Draft" type="object"
                                 states="cancel,done"/>
                         -->
-                        <button name="%(action_project_task_reevaluate)d" string="Reactivate" type="action"
+                        <button name="project_task_reevaluate" string="Reactivate" type="object"
                                 states="cancelled,done" context="{'button_reactivate':True}" groups="base.group_user"/>
                         <button name="action_close" string="Done" type="object"
                                 states="draft,open,pending" groups="base.group_user"/>