diff --git a/src/sunstone/public/app/tabs/templates-tab/form-panels/instantiate.js b/src/sunstone/public/app/tabs/templates-tab/form-panels/instantiate.js
index 224b6e45c8..9038389329 100644
--- a/src/sunstone/public/app/tabs/templates-tab/form-panels/instantiate.js
+++ b/src/sunstone/public/app/tabs/templates-tab/form-panels/instantiate.js
@@ -606,11 +606,19 @@ define(function(require) {
           CapacityInputs.setup(capacityContext);
           CapacityInputs.fill(capacityContext, template_json.VMTEMPLATE);
 
-          if (template_json.VMTEMPLATE.TEMPLATE.HYPERVISOR == "vcenter"){
-            $(".memory_input .mb_input input", context).attr("pattern", "^([048]|\\d*[13579][26]|\\d*[24680][048])$");
-          } else {
-            $(".memory_input .mb_input input", context).removeAttr("pattern");
-          }
+          var mb_input_unit = $(".memory_input .mb_input_unit", context);
+          mb_input_unit.off("change");
+          mb_input_unit.on("change", function() {
+            var isMB = $(this).val() === "MB";
+            var isVCenter = template_json.VMTEMPLATE.TEMPLATE.HYPERVISOR == "vcenter";
+
+            if (isMB && isVCenter) {
+              $(".memory_input .mb_input input", context).attr("pattern", "^([048]|\\d*[13579][26]|\\d*[24680][048])$");
+            } else {
+              $(".memory_input .mb_input input", context).removeAttr("pattern");
+            }
+          });
+          mb_input_unit.trigger("change");
 
           var cpuCost    = template_json.VMTEMPLATE.TEMPLATE.CPU_COST;
           var memoryCost = template_json.VMTEMPLATE.TEMPLATE.MEMORY_COST;
diff --git a/src/sunstone/public/app/utils/user-inputs.js b/src/sunstone/public/app/utils/user-inputs.js
index aa848accfe..ed65241d25 100644
--- a/src/sunstone/public/app/utils/user-inputs.js
+++ b/src/sunstone/public/app/utils/user-inputs.js
@@ -747,7 +747,7 @@ define(function(require) {
     var min = parseInt(element.attr("min"),10);
     var max = parseInt(element.attr("max"),10);
     if (value == ""){
-      $(".mb_input_unit", context).val("MB").change();
+      $(".mb_input_unit", context).val("MB").trigger("change");
     }else{
       // If you are going to put a new unit you must put it up in the html, here and down in the change
       if(value / (base**2) >= 1){
@@ -767,7 +767,7 @@ define(function(require) {
       }
       $("input.visor", contextElement).val(valueInUnit);
       var contextUnit = contextElement.siblings(".input-group-button");
-      $(".mb_input_unit", contextUnit).val(unit).change();
+      $(".mb_input_unit", contextUnit).val(unit).trigger("change");
     }
 
     $("div.mb_input", context).on("change", "input.visor, select", function(e){