diff --git a/htdocs/core/tpl/objectline_add.tpl.php b/htdocs/core/tpl/objectline_add.tpl.php
index 88a3022338f..30bafcd7a9d 100644
--- a/htdocs/core/tpl/objectline_add.tpl.php
+++ b/htdocs/core/tpl/objectline_add.tpl.php
@@ -60,6 +60,7 @@ if (! empty($conf->margin->enabled)) {
 <form name="addproduct" id="addproduct" action="<?php echo $_SERVER["PHP_SELF"].'?id='.$this->id; ?>#add" method="POST">
 <input type="hidden" name="token" value="<?php echo $_SESSION['newtoken']; ?>" />
 <input type="hidden" name="action" value="addline" />
+<input type="hidden" name="usenewaddlineform" value="1" />
 <input type="hidden" name="id" value="<?php echo $this->id; ?>" />
 
 <?php if (! empty($conf->product->enabled) || ! empty($conf->service->enabled)) { ?>
diff --git a/htdocs/core/tpl/objectline_edit.tpl.php b/htdocs/core/tpl/objectline_edit.tpl.php
index ac0fe494e0e..c9487574121 100644
--- a/htdocs/core/tpl/objectline_edit.tpl.php
+++ b/htdocs/core/tpl/objectline_edit.tpl.php
@@ -30,6 +30,7 @@
 <form action="<?php echo $_SERVER["PHP_SELF"].'?id='.$this->id.'#'.$line->id; ?>" method="POST">
 <input type="hidden" name="token" value="<?php  echo $_SESSION['newtoken']; ?>">
 <input type="hidden" name="action" value="updateligne">
+<input type="hidden" name="usenewupdatelineform" value="1" />
 <input type="hidden" name="id" value="<?php echo $this->id; ?>">
 <input type="hidden" name="lineid" value="<?php echo $line->id; ?>">
 <input type="hidden" id="product_type" name="type" value="<?php echo $line->product_type; ?>">