diff --git a/htdocs/projet/tasks.php b/htdocs/projet/tasks.php
index 204b393cc6d..c00e93e239f 100644
--- a/htdocs/projet/tasks.php
+++ b/htdocs/projet/tasks.php
@@ -1,7 +1,7 @@
 <?php
 /* Copyright (C) 2005      Rodolphe Quiedeville <rodolphe@quiedeville.org>
  * Copyright (C) 2004-2015 Laurent Destailleur  <eldy@users.sourceforge.net>
- * Copyright (C) 2005-2012 Regis Houssin        <regis.houssin@capnetworks.com>
+ * Copyright (C) 2005-2017 Regis Houssin        <regis.houssin@capnetworks.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -70,7 +70,9 @@ $hookmanager->initHooks(array('projecttaskcard','globalcard'));
 $progress=GETPOST('progress', 'int');
 $label=GETPOST('label', 'alpha');
 $description=GETPOST('description');
-$planned_workload=GETPOST('planned_workloadhour')*3600+GETPOST('planned_workloadmin')*60;
+$planned_workloadhour=(GETPOST('planned_workloadhour','int')?GETPOST('planned_workloadhour','int'):0);
+$planned_workloadmin=(GETPOST('planned_workloadmin','int')?GETPOST('planned_workloadmin','int'):0);
+$planned_workload=$planned_workloadhour*3600+$planned_workloadmin*60;
 
 $userAccess=0;