diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index e944d98aed3..00eca8b661a 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -1237,7 +1237,7 @@ class Form
      *
      *  @param	string	$selected       User id or user object of user preselected. If -1, we use id of current user.
      *  @param  string	$htmlname       Field name in form
-     *  @param  int		$show_empty     0=liste sans valeur nulle, 1=ajoute valeur inconnue
+     *  @param  int		$show_empty     0=list with no empty value, 1=add also an empty value into list
      *  @param  array	$exclude        Array list of users id to exclude
      * 	@param	int		$disabled		If select list must be disabled
      *  @param  array	$include        Array list of users id to include or 'hierarchy' to have only supervised users
@@ -1246,15 +1246,16 @@ class Form
      *  @param	int		$maxlength		Maximum length of string into list (0=no limit)
      *  @param	int		$showstatus		0=show user status only if status is disabled, 1=always show user status into label, -1=never show user status
      *  @param	string	$morefilter		Add more filters into sql request
+     *  @param	string	$show_every		0=default list, 1=add also a value "Everybody" at beginning of list
      * 	@return	string					HTML select string
      *  @see select_dolgroups
      */
-    function select_dolusers($selected='', $htmlname='userid', $show_empty=0, $exclude='', $disabled=0, $include='', $enableonly='', $force_entity=0, $maxlength=0, $showstatus=0, $morefilter='')
+    function select_dolusers($selected='', $htmlname='userid', $show_empty=0, $exclude='', $disabled=0, $include='', $enableonly='', $force_entity=0, $maxlength=0, $showstatus=0, $morefilter='', $show_every=0)
     {
         global $conf,$user,$langs;
 
         // If no preselected user defined, we take current user
-        if ((is_numeric($selected) && ($selected < -1 || empty($selected))) && empty($conf->global->SOCIETE_DISABLE_DEFAULT_SALESREPRESENTATIVE)) $selected=$user->id;
+        if ((is_numeric($selected) && ($selected < -2 || empty($selected))) && empty($conf->global->SOCIETE_DISABLE_DEFAULT_SALESREPRESENTATIVE)) $selected=$user->id;
 
         $excludeUsers=null;
         $includeUsers=null;
@@ -1333,6 +1334,7 @@ class Form
 
                 $out.= '<select class="flat" id="'.$htmlname.'" name="'.$htmlname.'"'.($disabled?' disabled="disabled"':'').$nodatarole.'>';
                 if ($show_empty) $out.= '<option value="-1"'.((empty($selected) || $selected==-1)?' selected="selected"':'').'>&nbsp;</option>'."\n";
+				if ($show_every) $out.= '<option value="-2"'.(($selected==-2)?' selected="selected"':'').'>-- '.$langs->trans("Everybody").' --</option>'."\n";
 
                 $userstatic=new User($this->db);
 
diff --git a/htdocs/projet/tasks/contact.php b/htdocs/projet/tasks/contact.php
index 99d127fb9a9..acfd5d81566 100644
--- a/htdocs/projet/tasks/contact.php
+++ b/htdocs/projet/tasks/contact.php
@@ -1,6 +1,6 @@
 <?php
 /* Copyright (C) 2005		Rodolphe Quiedeville	<rodolphe@quiedeville.org>
- * Copyright (C) 2006-2010	Laurent Destailleur		<eldy@users.sourceforge.net>
+ * Copyright (C) 2006-2015	Laurent Destailleur		<eldy@users.sourceforge.net>
  * Copyright (C) 2010-2012	Regis Houssin			<regis.houssin@capnetworks.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -61,8 +61,27 @@ if ($action == 'addcontact' && $user->rights->projet->creer)
 
     if ($result > 0 && $id > 0)
     {
-    	$idfortaskuser=GETPOST("contactid")>0?GETPOST("contactid"):GETPOST("userid");
-  		$result = $object->add_contact($idfortaskuser, GETPOST("type"), GETPOST("source"));
+    	$idfortaskuser=(GETPOST("contactid")!=0)?GETPOST("contactid"):GETPOST("userid");	// GETPOST('contactid') may val -1 to mean empty or -2 to means "everybody"
+    	if ($idfortaskuser == -2)
+    	{
+    		$result=$projectstatic->fetch($object->fk_project);
+    		if ($result <= 0)
+    		{
+    			dol_print_error($db,$projectstatic->error,$projectstatic->errors);
+    		}
+    		else
+    		{
+    			$contactsofproject=$projectstatic->getListContactId('internal');
+    			foreach($contactsofproject as $key => $val)
+    			{
+    				$result = $object->add_contact($val, GETPOST("type"), GETPOST("source"));
+    			}
+    		}
+    	}
+    	else
+    	{
+  			$result = $object->add_contact($idfortaskuser, GETPOST("type"), GETPOST("source"));
+    	}
     }
 
 	if ($result >= 0)
@@ -282,7 +301,7 @@ if ($id > 0 || ! empty($ref))
 		print '<table class="noborder" width="100%">';
 
 		/*
-		 * Ajouter une ligne de contact
+		 * Add a new contact line
 		 * Non affiche en mode modification de ligne
 		 */
 		if ($action != 'editline' && $user->rights->projet->creer)
@@ -318,7 +337,7 @@ if ($id > 0 || ! empty($ref))
 			print '<td colspan="1">';
 			// On recupere les id des users deja selectionnes
 			$contactsofproject=$projectstatic->getListContactId('internal');
-			$form->select_users($user->id,'contactid',0,'',0,'',$contactsofproject);
+			print $form->select_dolusers((GETPOST('contactid')?GETPOST('contactid'):$user->id), 'contactid', 0, '', 0, '', $contactsofproject, 0, 0, 0, '', 1);
 			print '</td>';
 			print '<td>';
 			$formcompany->selectTypeContact($object, '', 'type','internal','rowid');