diff --git a/ui/scripts/ui-custom/enableStaticNAT.js b/ui/scripts/ui-custom/enableStaticNAT.js
index 67a54e16ed6..405813e7a39 100644
--- a/ui/scripts/ui-custom/enableStaticNAT.js
+++ b/ui/scripts/ui-custom/enableStaticNAT.js
@@ -75,6 +75,11 @@
             text: _l('label.apply'),
             'class': 'ok',
             click: function() {
+              if ($dataList.find('.tier-select select').val() == -1) {
+                cloudStack.dialog.notice({ message: ('Please select a tier')});
+                 return false;
+               } 
+
               if (!$dataList.find(
                 'input[type=radio]:checked, input[type=checkbox]:checked'
               ).size()) {
@@ -160,4 +165,4 @@
       }
     };
   };
-}(cloudStack, jQuery));
\ No newline at end of file
+}(cloudStack, jQuery));