diff --git a/htdocs/core/modules/modProjet.class.php b/htdocs/core/modules/modProjet.class.php
index dcfef83f8e3..54cd897102e 100644
--- a/htdocs/core/modules/modProjet.class.php
+++ b/htdocs/core/modules/modProjet.class.php
@@ -247,8 +247,8 @@ class modProjet extends DolibarrModules
 		$keyforselect='projet'; $keyforelement='project'; $keyforaliasextra='extra';
 		include DOL_DOCUMENT_ROOT.'/core/extrafieldsinexport.inc.php';
 		// Add fields for tasks
-        $this->export_fields_array[$r]=array_merge($this->export_fields_array[$r], array('pt.rowid'=>'RefTask','pt.label'=>'LabelTask','pt.dateo'=>"TaskDateStart",'pt.datee'=>"TaskDateEnd",'pt.duration_effective'=>"DurationEffective",'pt.planned_workload'=>"PlannedWorkload",'pt.progress'=>"Progress",'pt.description'=>"TaskDescription"));
-		$this->export_entities_array[$r]=array_merge($this->export_entities_array[$r], array('pt.rowid'=>'projecttask','pt.label'=>'projecttask','pt.dateo'=>"projecttask",'pt.datee'=>"projecttask",'pt.duration_effective'=>"projecttask",'pt.planned_workload'=>"projecttask",'pt.progress'=>"projecttask",'pt.description'=>"projecttask"));
+		$this->export_fields_array[$r]=array_merge($this->export_fields_array[$r], array('pt.rowid'=>'TaskId', 'pt.ref'=>'RefTask', 'pt.label'=>'LabelTask','pt.dateo'=>"TaskDateStart",'pt.datee'=>"TaskDateEnd",'pt.duration_effective'=>"DurationEffective",'pt.planned_workload'=>"PlannedWorkload",'pt.progress'=>"Progress",'pt.description'=>"TaskDescription"));
+		$this->export_entities_array[$r]=array_merge($this->export_entities_array[$r], array('pt.rowid'=>'projecttask', 'pt.ref'=>'projecttask', 'pt.label'=>'projecttask','pt.dateo'=>"projecttask",'pt.datee'=>"projecttask",'pt.duration_effective'=>"projecttask",'pt.planned_workload'=>"projecttask",'pt.progress'=>"projecttask",'pt.description'=>"projecttask"));
         // Add extra fields for task
 		$keyforselect='projet_task'; $keyforelement='projecttask'; $keyforaliasextra='extra2';
 		include DOL_DOCUMENT_ROOT.'/core/extrafieldsinexport.inc.php';