diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 1b46a656511..aa0c575d8d7 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -787,13 +787,14 @@ class Product extends CommonObject
      *    Update a record into database.
      *  If batch flag is set to on, we create records into llx_product_batch
      *
-     * @param  int    $id        Id of product
-     * @param  User   $user      Object user making update
-     * @param  int    $notrigger Disable triggers
-     * @param  string $action    Current action for hookmanager ('add' or 'update')
+     * @param  int    $id          Id of product
+     * @param  User   $user        Object user making update
+     * @param  int    $notrigger   Disable triggers
+     * @param  string $action      Current action for hookmanager ('add' or 'update')
+	 * @param  int    $updatetype  Update product type
      * @return int                 1 if OK, -1 if ref already exists, -2 if other error
      */
-    public function update($id, $user, $notrigger = false, $action = 'update')
+    public function update($id, $user, $notrigger = false, $action = 'update', $updatetype = false)
     {
         global $langs, $conf, $hookmanager;
 
@@ -939,6 +940,11 @@ class Product extends CommonObject
 
             $sql = "UPDATE ".MAIN_DB_PREFIX."product";
             $sql.= " SET label = '" . $this->db->escape($this->label) ."'";
+            
+            if ($updatetype && ($this->isProduct() || $this->isService())) {
+                $sql.= ", fk_product_type = " . $this->type;
+            }
+            
             $sql.= ", ref = '" . $this->db->escape($this->ref) ."'";
             $sql.= ", ref_ext = ".(! empty($this->ref_ext)?"'".$this->db->escape($this->ref_ext)."'":"null");
             $sql.= ", default_vat_code = ".($this->default_vat_code ? "'".$this->db->escape($this->default_vat_code)."'" : "null");