diff --git a/htdocs/core/class/dolreceiptprinter.class.php b/htdocs/core/class/dolreceiptprinter.class.php
index 205ee1eafe8..c109bc65733 100644
--- a/htdocs/core/class/dolreceiptprinter.class.php
+++ b/htdocs/core/class/dolreceiptprinter.class.php
@@ -1,5 +1,5 @@
 <?php
-/* Copyright (C) 2015-2019  Frédéric France     <frederic.france@netlogic.fr>
+/* Copyright (C) 2015-2021  Frédéric France     <frederic.france@netlogic.fr>
  * Copyright (C) 2020       Andreu Bisquerra    <jove@bisquerra.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -565,7 +565,7 @@ class dolReceiptPrinter extends Printer
 	 */
 	public function sendToPrinter($object, $templateid, $printerid)
 	{
-		global $conf, $mysoc, $langs, $user, $db;
+		global $conf, $mysoc, $langs, $user;
 		$error = 0;
 		$ret = $this->loadTemplate($templateid);
 
@@ -830,8 +830,8 @@ class dolReceiptPrinter extends Printer
 						break;
 					case 'DOL_VALUE_PLACE':
 							$sql = "SELECT floor, label FROM ".MAIN_DB_PREFIX."takepos_floor_tables where rowid=".((int) str_replace(")", "", str_replace("(PROV-POS".$_SESSION["takeposterminal"]."-", "", $object->ref)));
-							$resql = $db->query($sql);
-							$obj = $db->fetch_object($resql);
+							$resql = $this->db->query($sql);
+							$obj = $this->db->fetch_object($resql);
 						if ($obj) {
 							$this->printer->text($obj->label);
 						}