diff --git a/htdocs/product/price.php b/htdocs/product/price.php
index b03a8763770..7c58069585e 100644
--- a/htdocs/product/price.php
+++ b/htdocs/product/price.php
@@ -1,9 +1,9 @@
 <?php
-/* Copyright (C) 2001-2007	Rodolphe Quiedeville	<rodolphe@quiedeville.org>
+/* Copyright (C) 2001-2007	Rodolphe Quiedeville		<rodolphe@quiedeville.org>
  * Copyright (C) 2004-2014	Laurent Destailleur		<eldy@users.sourceforge.net>
  * Copyright (C) 2005		Eric Seigne				<eric.seigne@ryxeo.com>
- * Copyright (C) 2005-2015	Regis Houssin			<regis.houssin@capnetworks.com>
- * Copyright (C) 2006		Andre Cianfarani		<acianfa@free.fr>
+ * Copyright (C) 2005-2017	Regis Houssin			<regis.houssin@capnetworks.com>
+ * Copyright (C) 2006		Andre Cianfarani			<acianfa@free.fr>
  * Copyright (C) 2014		Florian Henry			<florian.henry@open-concept.pro>
  * Copyright (C) 2014-2016	Juanjo Menent			<jmenent@2byte.es>
  * Copyright (C) 2014-2015 	Philippe Grand 		    <philippe.grand@atoo-net.com>
@@ -1171,7 +1171,7 @@ if ($action == 'edit_price' && $object->getRights()->creer)
 		}
 		print '</td>';
 		print '</tr>';
-		
+
 		$parameters=array('colspan' => 2);
 		$reshook=$hookmanager->executeHooks('formObjectOptions',$parameters,$object,$action);    // Note that $action and $object may have been modified by hook
 
@@ -1493,10 +1493,8 @@ if (! empty($conf->global->PRODUIT_CUSTOMER_PRICES))
 
 	$sortfield = GETPOST("sortfield", 'alpha');
 	$sortorder = GETPOST("sortorder", 'alpha');
-	$page = GETPOST("page", 'int');
-	if ($page == - 1) {
-		$page = 0;
-	}
+	$page = (GETPOST("page",'int')?GETPOST("page", 'int'):0);
+	if (empty($page) || $page == -1) { $page = 0; }     // If $page is not defined, or '' or -1
 	$offset = $conf->liste_limit * $page;
 	$pageprev = $page - 1;
 	$pagenext = $page + 1;