diff --git a/htdocs/categories/class/categorie.class.php b/htdocs/categories/class/categorie.class.php
index b5e46cc475a..67d821578dd 100644
--- a/htdocs/categories/class/categorie.class.php
+++ b/htdocs/categories/class/categorie.class.php
@@ -472,7 +472,7 @@ class Categorie extends CommonObject
 	 * 	Link an object to the category
 	 *
 	 *	@param		Object	$obj	Object to link to category
-	 * 	@param		string	$type	Type of category ('societe', 'member', 'customer', 'supplier', 'product', 'contact')
+	 * 	@param		string	$type	Type of category ('societe', 'member', 'product', 'contact', 'fournisseur)
 	 * 	@return		int				1 : OK, -1 : erreur SQL, -2 : id not defined, -3 : Already linked
 	 */
 	function add_type($obj,$type)
@@ -485,8 +485,8 @@ class Categorie extends CommonObject
 
 		// For backward compatibility
 		if ($type == 'company')  $type='societe';
-		if ($type == 'customer') $type='societe';
-		if ($type == 'supplier') $type='fournisseur';
+		elseif ($type == 'customer') $type='societe';
+		elseif ($type == 'supplier') $type='fournisseur';
 
 		/**
 		 * llx_categorie_contact => fk_socpeople
@@ -496,7 +496,7 @@ class Categorie extends CommonObject
 		 */
 		if ($type == 'contact') {
 			$column_name = 'socpeople';
-		} elseif ($type == 'supplier' || ($type == 'societe')) {
+		} elseif ($type == 'fournisseur' || ($type == 'societe')) {
 			$column_name = 'soc';
 		} else {
 			$column_name = 'type';