diff --git a/htdocs/categories/categorie.class.php b/htdocs/categories/categorie.class.php
index d6cb6df2bb2..51b0b76ee23 100644
--- a/htdocs/categories/categorie.class.php
+++ b/htdocs/categories/categorie.class.php
@@ -670,6 +670,35 @@ class Categorie
       }
   }
 	
+	  /**
+   * Retourne les catégories contenant le produit $ref
+   */
+  function containing_ref ($ref)
+  {
+    $cats = array ();
+		
+    $sql = "SELECT c.fk_categorie, c.fk_product, p.rowid, p.label";
+    $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";
+
+    $res = $this->db->query ($sql);
+		
+    if ($res)
+    {
+	     while ($cat = $this->db->fetch_array ($res))
+	     {
+	        $cats[] = new Categorie ($this->db, $cat['fk_categorie']);
+	     }
+
+	  return $cats;
+    }
+    else
+    {
+	     dolibarr_print_error ($this->db);
+	     return -1;
+    }
+  }
+	
   /**
    * Retourne les catégories dont le nom correspond ŕ $nom
    * ajoute des wildcards sauf si $exact = true
diff --git a/htdocs/product/categorie.php b/htdocs/product/categorie.php
index 9b3e996f59c..55abdec5146 100644
--- a/htdocs/product/categorie.php
+++ b/htdocs/product/categorie.php
@@ -149,8 +149,16 @@ if ($_GET["id"] || $_GET["ref"])
             print '</tr>';
 
       $c = new Categorie($db);
-      $cats = $c->containing($_REQUEST['id']);
       
+      if ($_GET["id"])
+      {
+        $cats = $c->containing($_REQUEST['id']);
+      }
+      else
+      {
+      	$cats = $c->containing_ref($_REQUEST['ref']);
+      }
+            
       if (sizeof($cats) > 0)
 	{
 	  print "Vous avez stocké le produit dans les catégorie suivantes:<br/><br/>";