diff --git a/htdocs/core/class/html.formprojet.class.php b/htdocs/core/class/html.formprojet.class.php
index 25e2cb13d81..2e3bdafc319 100644
--- a/htdocs/core/class/html.formprojet.class.php
+++ b/htdocs/core/class/html.formprojet.class.php
@@ -456,6 +456,7 @@ class FormProjets
 	 *    @param	string		$socid				If of thirdparty to use as filter or 'id1,id2,...'
 	 *    @param	string		$morecss			More CSS
 	 *    @param    int         $limitonstatus      Add filters to limit length of list to opened status (for example to avoid ERR_RESPONSE_HEADERS_TOO_BIG on project/element.php page). TODO To implement
+	 *    @param	string		$projectkey			Equivalent key  to fk_projet for actual table_element
 	 *    @return	int|string						The HTML select list of element or '' if nothing or -1 if KO
 	 */
 	function select_element($table_element, $socid=0, $morecss='', $limitonstatus=-2,$projectkey="fk_projet")
diff --git a/htdocs/projet/class/project.class.php b/htdocs/projet/class/project.class.php
index 1078733c19e..c8c36a697fb 100644
--- a/htdocs/projet/class/project.class.php
+++ b/htdocs/projet/class/project.class.php
@@ -516,9 +516,10 @@ class Project extends CommonObject
      * 	@param		string		$datefieldname	name of date field for filter
      *  @param		int			$dates			Start date
      *  @param		int			$datee			End date
+	 *	@param		string		$projectkey		Equivalent key  to fk_projet for actual type
      * 	@return		mixed						Array list of object ids linked to project, < 0 or string if error
      */
-    function get_element_list($type, $tablename, $datefieldname='', $dates='', $datee='', $project_field='fk_projet')
+    function get_element_list($type, $tablename, $datefieldname='', $dates='', $datee='', $projectkey='fk_projet')
     {
         $elements = array();
 
@@ -548,7 +549,7 @@ class Project extends CommonObject
 		}
         else
 		{
-            $sql = "SELECT rowid FROM " . MAIN_DB_PREFIX . $tablename." WHERE ".$project_field." IN (". $ids .")";
+            $sql = "SELECT rowid FROM " . MAIN_DB_PREFIX . $tablename." WHERE ".$projectkey." IN (". $ids .")";
 		}
 
 		if ($dates > 0)