diff --git a/htdocs/accountancy/bookkeeping/balance.php b/htdocs/accountancy/bookkeeping/balance.php
index 02174ea2524..86ec1162832 100644
--- a/htdocs/accountancy/bookkeeping/balance.php
+++ b/htdocs/accountancy/bookkeeping/balance.php
@@ -38,7 +38,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/class/html.formother.class.php';
 // Load translation files required by the page
 $langs->loadLangs(array("accountancy"));
 
-$page = GETPOST("page");
+$page = GETPOST("page", 'int');
 $sortorder = GETPOST("sortorder", 'alpha');
 $sortfield = GETPOST("sortfield", 'alpha');
 $action = GETPOST('action', 'aZ09');