diff --git a/workflow/engine/methods/cases/cases_StepToReviseInputs.php b/workflow/engine/methods/cases/cases_StepToReviseInputs.php
index 3b3de672c..a90e1d140 100644
--- a/workflow/engine/methods/cases/cases_StepToReviseInputs.php
+++ b/workflow/engine/methods/cases/cases_StepToReviseInputs.php
@@ -91,9 +91,11 @@ $oCase = new Cases();
 $Fields = $oCase->loadCase( $_SESSION['APPLICATION'] );
 
 $G_PUBLISH = new Publisher();
-
-if (! isset( $_GET['ex'] )) {
+$ex = 0;
+if (! isset( $_GET['ex'] ) || empty($_GET['ex'])) {
     $_GET['ex'] = 0;
+} else {
+    $ex = $filter->xssFilterHard($_GET['ex']);
 }
 
 if (! isset( $_GET['INP_DOC_UID'] )) {
@@ -139,7 +141,7 @@ G::RenderPage( 'publish', 'blank' );
 //Deprecated Section since the interface are now movig to ExtJS
 function setSelect()
 {
-    var ex=<?php echo $filter->xssFilterHard($_GET['ex'])?>;
+    var ex=<?php echo $ex; ?>;
     try {
         for (i=1; i<50; i++) {
             if (i == ex) {