diff --git a/htdocs/categories/class/categorie.class.php b/htdocs/categories/class/categorie.class.php
index 14cdfe84783..27330f45ffe 100644
--- a/htdocs/categories/class/categorie.class.php
+++ b/htdocs/categories/class/categorie.class.php
@@ -175,11 +175,10 @@ class Categorie extends CommonObject
 	);
 
 	/**
-	 * @var array Object table mapping from type string (table llx_...) when value of key does not match table name.
-	 *
-	 * @note Move to const array when PHP 5.6 will be our minimum target
+	 * @var array 	Object table mapping from type string (table llx_...) when value of key does not match table name.
+	 * 				This array may be completed by external modules with hook "constructCategory"
 	 */
-	public static $MAP_OBJ_TABLE = array(
+	public $MAP_OBJ_TABLE = array(
 		'customer' => 'societe',
 		'supplier' => 'societe',
 		'member'   => 'adherent',