diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index cf9a0c3fa87..bb411d530c7 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -1802,7 +1802,7 @@ class Product extends CommonObject
 	 */
 	public function getSellPrice($thirdparty_seller, $thirdparty_buyer, $pqp = 0)
 	{
-		global $conf, $db;
+		global $conf, $db, $hookmanager;
 
 		// call hook if any
 		$hookmanager->initHooks(array('productdao'));