diff --git a/workflow/engine/classes/class.xmlfield_InputPM.php b/workflow/engine/classes/class.xmlfield_InputPM.php
index aff372876..1d4b22ddf 100755
--- a/workflow/engine/classes/class.xmlfield_InputPM.php
+++ b/workflow/engine/classes/class.xmlfield_InputPM.php
@@ -361,7 +361,7 @@ class XmlForm_Field_hours extends XmlForm_Field_SimpleText
   * @parameter boolean $bSystemVars
   * @return array
   */
-  function getDynaformsVars($sProcessUID, $bSystemVars = true, $bIncMulSelFields = false)
+  function getDynaformsVars($sProcessUID, $bSystemVars = true, $bIncMulSelFields = 0)
   {
     $aFields = array();
     $aFieldsNames = array();
@@ -375,7 +375,7 @@ class XmlForm_Field_hours extends XmlForm_Field_SimpleText
     }
     $aInvalidTypes = array('title', 'subtitle', 'link', 'file', 'button', 'reset', 'submit', 'javascript');
     $aMultipleSelectionFields = array('listbox', 'checkgroup', 'grid');
-    if (!$bIncMulSelFields) {
+    if ($bIncMulSelFields != 0) {
       $aInvalidTypes = array_merge($aInvalidTypes, $aMultipleSelectionFields);
     }
     require_once 'classes/model/Dynaform.php';
@@ -395,7 +395,7 @@ class XmlForm_Field_hours extends XmlForm_Field_SimpleText
               if (!in_array($k, $aFieldsNames)) {
                 $aFields[] = array('sName' => $k,
                                    'sType' => $v->type,
-                                   'sLabel'=> $v->label
+                                   'sLabel'=> ($v->type != 'grid' ? $v->label : '[ ' . G::LoadTranslation('ID_GRID') . ' ]')
                                   );
                 $aFieldsNames[] = $k;
               }
diff --git a/workflow/engine/js/controls/varsAjax.js b/workflow/engine/js/controls/varsAjax.js
index 3b0c53414..9e88fae0d 100755
--- a/workflow/engine/js/controls/varsAjax.js
+++ b/workflow/engine/js/controls/varsAjax.js
@@ -19,7 +19,7 @@ var changeVariables = function(varType,proUid,field,symbol,target) {
       url   : '../controls/varsAjaxByType',
       async : true,
       method: 'POST',
-      args  : "type="+varType+"&sProcess="+proUid+"&sFieldName="+field+"&sSymbol="+symbol+"&bIncMulSelFields=1"
+      args  : "type="+varType+"&sProcess="+proUid+"&sFieldName="+field+"&sSymbol="+symbol+"&bIncMulSelFields=0"
     });
 
     oRPC.callback = function(rpc){
diff --git a/workflow/engine/methods/controls/varsAjax.php b/workflow/engine/methods/controls/varsAjax.php
index 59021fae3..1e5f251d0 100755
--- a/workflow/engine/methods/controls/varsAjax.php
+++ b/workflow/engine/methods/controls/varsAjax.php
@@ -23,7 +23,7 @@
  *
  */
 G::LoadClass('xmlfield_InputPM');
-$aFields = getDynaformsVars($_POST['sProcess'], true, isset($_POST['bIncMulSelFields']) ? (boolean)$_POST['bIncMulSelFields'] : false);
+$aFields = getDynaformsVars($_POST['sProcess'], true, isset($_POST['bIncMulSelFields']) ? $_POST['bIncMulSelFields'] : 0);
 
 $sHTML = '<select name="_Var_Form_" id="_Var_Form_" size="' . count($aFields) . '" style="width:100%;' . (! isset($_POST['sNoShowLeyend']) ? 'height:50%;' : '') . '" ondblclick="insertFormVar(\'' . $_POST['sFieldName'] . '\', this.value);">';
 foreach ( $aFields as $aField ) {
diff --git a/workflow/engine/methods/controls/varsAjaxByType.php b/workflow/engine/methods/controls/varsAjaxByType.php
index f31590e7e..c3065b93b 100755
--- a/workflow/engine/methods/controls/varsAjaxByType.php
+++ b/workflow/engine/methods/controls/varsAjaxByType.php
@@ -35,7 +35,7 @@
  */
 
 G::LoadClass('xmlfield_InputPM');
-$aFields = getDynaformsVars($_POST['sProcess'], true, isset($_POST['bIncMulSelFields']) ? (boolean)$_POST['bIncMulSelFields'] : false);
+$aFields = getDynaformsVars($_POST['sProcess'], true, isset($_POST['bIncMulSelFields']) ? $_POST['bIncMulSelFields'] : 0);
 $aType = $_POST['type'];
 
 $aRows[0] = Array (