diff --git a/htdocs/categories/categorie.class.php b/htdocs/categories/categorie.class.php
index 51b0b76ee23..95e94660621 100644
--- a/htdocs/categories/categorie.class.php
+++ b/htdocs/categories/categorie.class.php
@@ -677,9 +677,9 @@ class Categorie
   {
     $cats = array ();
 		
-    $sql = "SELECT c.fk_categorie, c.fk_product, p.rowid, p.label";
+    $sql = "SELECT c.fk_categorie, c.fk_product, p.rowid, p.ref";
     $sql.= " FROM ".MAIN_DB_PREFIX."categorie_product as c, ".MAIN_DB_PREFIX."product as p";
-    $sql.= " WHERE  p.label = '".$ref."' AND c.fk_product = p.rowid";
+    $sql.= " WHERE  p.ref = '".$ref."' AND c.fk_product = p.rowid";
 
     $res = $this->db->query ($sql);
 		
diff --git a/htdocs/product/categorie.php b/htdocs/product/categorie.php
index 55abdec5146..97fe8b3c7d2 100644
--- a/htdocs/product/categorie.php
+++ b/htdocs/product/categorie.php
@@ -152,11 +152,12 @@ if ($_GET["id"] || $_GET["ref"])
       
       if ($_GET["id"])
       {
-        $cats = $c->containing($_REQUEST['id']);
+        $cats = $c->containing($_REQUEST["id"]);
       }
-      else
+      
+      if ($_GET["ref"])
       {
-      	$cats = $c->containing_ref($_REQUEST['ref']);
+      	$cats = $c->containing_ref($_REQUEST["ref"]);
       }
             
       if (sizeof($cats) > 0)