diff --git a/htdocs/categories/class/categorie.class.php b/htdocs/categories/class/categorie.class.php
index 46063c0f8c4..a8018e2c104 100644
--- a/htdocs/categories/class/categorie.class.php
+++ b/htdocs/categories/class/categorie.class.php
@@ -1201,6 +1201,8 @@ class Categorie extends CommonObject
 	 */
 	function get_all_categories($type=null, $parent=false)
 	{
+		if (! is_numeric($type)) $type = $this->MAP_ID[$type];
+
 		$sql = "SELECT rowid FROM ".MAIN_DB_PREFIX."categorie";
 		$sql.= " WHERE entity IN (".getEntity('category').")";
 		if (! is_null($type))