diff --git a/htdocs/core/class/html.formother.class.php b/htdocs/core/class/html.formother.class.php
index 66e624e96b9..2ee6b18a44f 100644
--- a/htdocs/core/class/html.formother.class.php
+++ b/htdocs/core/class/html.formother.class.php
@@ -274,15 +274,17 @@ class FormOther
      *    @param    int		$increment     	increment value
      *    @param    int		$start         	start value
      *    @param    int		$end           	end value
+     *    @param    int     $showempty      Add also an empty line
      *    @return   string					HTML select string
      */
-    function select_percent($selected=0,$htmlname='percent',$disabled=0,$increment=5,$start=0,$end=100)
+    function select_percent($selected=0,$htmlname='percent',$disabled=0,$increment=5,$start=0,$end=100,$showempty=0)
     {
         $return = '<select class="flat" name="'.$htmlname.'" '.($disabled?'disabled':'').'>';
+        if ($showempty) $return.='<option value="-1"'.(($selected == -1 || $selected == '')?' selected':'').'>&nbsp;</option>';
 
         for ($i = $start ; $i <= $end ; $i += $increment)
         {
-            if ($selected == $i)
+            if ($selected != '' && (int) $selected == $i)
             {
                 $return.= '<option value="'.$i.'" selected>';
             }
diff --git a/htdocs/projet/class/task.class.php b/htdocs/projet/class/task.class.php
index 9a1819fc46c..dad46c96989 100644
--- a/htdocs/projet/class/task.class.php
+++ b/htdocs/projet/class/task.class.php
@@ -100,7 +100,7 @@ class Task extends CommonObject
         // Clean parameters
         $this->label = trim($this->label);
         $this->description = trim($this->description);
-
+        
         // Check parameters
         // Put here code to add control on parameters values
 
@@ -128,7 +128,7 @@ class Task extends CommonObject
         $sql.= ", ".($this->date_start!=''?"'".$this->db->idate($this->date_start)."'":'null');
         $sql.= ", ".($this->date_end!=''?"'".$this->db->idate($this->date_end)."'":'null');
         $sql.= ", ".($this->planned_workload!=''?$this->planned_workload:0);
-        $sql.= ", ".($this->progress!=''?$this->progress:0);
+        $sql.= ", ".(($this->progress!='' && $this->progress >= 0)?$this->progress:'null');
         $sql.= ")";
 
         $this->db->begin();
@@ -300,7 +300,7 @@ class Task extends CommonObject
         $sql.= " planned_workload=".((isset($this->planned_workload) && $this->planned_workload != '')?$this->planned_workload:"null").",";
         $sql.= " dateo=".($this->date_start!=''?"'".$this->db->idate($this->date_start)."'":'null').",";
         $sql.= " datee=".($this->date_end!=''?"'".$this->db->idate($this->date_end)."'":'null').",";
-        $sql.= " progress=".$this->progress.",";
+        $sql.= " progress=".(($this->progress!='' && $this->progress >= 0)?$this->progress:'null').",";
         $sql.= " rang=".((!empty($this->rang))?$this->rang:"0");
         $sql.= " WHERE rowid=".$this->id;
 
diff --git a/htdocs/projet/tasks.php b/htdocs/projet/tasks.php
index 35a7812d4fa..06bd2c9c730 100644
--- a/htdocs/projet/tasks.php
+++ b/htdocs/projet/tasks.php
@@ -391,14 +391,14 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 	print $form->select_date(($date_end?$date_end:-1),'datee',1,1,0,'',1,1,1);
 	print '</td></tr>';
 
-	// planned workload
+	// Planned workload
 	print '<tr><td>'.$langs->trans("PlannedWorkload").'</td><td>';
 	print $form->select_duration('planned_workload', $planned_workload?$planned_workload : $object->planned_workload,0,'text');
 	print '</td></tr>';
 
 	// Progress
 	print '<tr><td>'.$langs->trans("ProgressDeclared").'</td><td colspan="3">';
-	print $formother->select_percent($progress,'progress');
+	print $formother->select_percent($progress,'progress',0,5,0,100,1);
 	print '</td></tr>';
 
 	// Description
diff --git a/htdocs/projet/tasks/task.php b/htdocs/projet/tasks/task.php
index f0a55517881..603a69a07b0 100644
--- a/htdocs/projet/tasks/task.php
+++ b/htdocs/projet/tasks/task.php
@@ -391,12 +391,12 @@ if ($id > 0 || ! empty($ref))
 
 			// Planned workload
 			print '<tr><td>'.$langs->trans("PlannedWorkload").'</td><td>';
-			print $form->select_duration('planned_workload',$object->planned_workload,0,'text');
+			print $form->select_duration('planned_workload', $object->planned_workload, 0, 'text');
 			print '</td></tr>';
 
 			// Progress declared
-			print '<tr><td>'.$langs->trans("ProgressDeclared").'</td><td colspan="3">';
-			print $formother->select_percent($object->progress,'progress');
+			print '<tr><td>'.$langs->trans("ProgressDeclared").'</td><td>';
+			print $formother->select_percent($object->progress,'progress',0,5,0,100,1);
 			print '</td></tr>';
 
 			// Description