diff --git a/htdocs/core/ajax/vatrates.php b/htdocs/core/ajax/vatrates.php
index d987b074bc6..c4ecc36ae9b 100644
--- a/htdocs/core/ajax/vatrates.php
+++ b/htdocs/core/ajax/vatrates.php
@@ -49,7 +49,13 @@ if (! empty($id) && ! empty($action) && ! empty($htmlname))
 	
 	$soc->fetch($id);
 	
-	echo $form->load_tva('tva_tx','',$soc,$mysoc,0,0,'',true);
+	$return=array();
+	
+	$return['value']	= $form->load_tva('tva_tx','',$soc,$mysoc,0,0,'',true);
+	$return['num']		= $form->num;
+	$return['error']	= $form->error;
+	
+	echo json_encode($return);
 }
 
 ?>
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index d6500658dd1..6a231f95f33 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -3047,7 +3047,8 @@ class Form
         {
             $return.= $this->error;
         }
-
+        
+        $this->num = $num;
         return $return;
     }