diff --git a/addons/project/wizard/project_task_reevaluate.py b/addons/project/wizard/project_task_reevaluate.py
index 9e7c23b3484..ce3e728a98e 100644
--- a/addons/project/wizard/project_task_reevaluate.py
+++ b/addons/project/wizard/project_task_reevaluate.py
@@ -73,9 +73,9 @@ class project_task_reevaluate(osv.osv_memory):
         if context is None:
             context = {}
         data = self.browse(cr, uid, ids, context=context)[0]
-        task_pool = self.pool.get('project.task')
         task_id = context.get('active_id')
         if task_id:
+            task_pool = self.pool.get('project.task')
             task_pool.write(cr, uid, task_id, {'remaining_hours': data.remaining_hours})
             if context.get('button_reactivate'):
                 task_pool.do_reopen(cr, uid, [task_id], context=context)