diff --git a/htdocs/projet/class/api_tasks.class.php b/htdocs/projet/class/api_tasks.class.php
index 49a5d9d418b..5c1dae46822 100644
--- a/htdocs/projet/class/api_tasks.class.php
+++ b/htdocs/projet/class/api_tasks.class.php
@@ -545,7 +545,7 @@ class Tasks extends DolibarrApi
 		$this->task->timespent_datehour = $newdate;
 		$this->task->timespent_withhour = 1;
 		$this->task->timespent_duration = $duration;
-		$this->task->timespent_fk_user  = $user_id;
+		$this->task->timespent_fk_user  = $uid;
 		$this->task->timespent_note     = $note;
 
 		$result = $this->task->addTimeSpent(DolibarrApiAccess::$user, 0);