diff --git a/vmware-base/src/com/cloud/hypervisor/vmware/mo/CustomFieldConstants.java b/vmware-base/src/com/cloud/hypervisor/vmware/mo/CustomFieldConstants.java
index 4cd5f9b844b..11bc1576c35 100644
--- a/vmware-base/src/com/cloud/hypervisor/vmware/mo/CustomFieldConstants.java
+++ b/vmware-base/src/com/cloud/hypervisor/vmware/mo/CustomFieldConstants.java
@@ -21,4 +21,5 @@ public interface CustomFieldConstants {
 	public final static String CLOUD_GC = "cloud.gc";
 	public final static String CLOUD_GC_DVP = "cloud.gc.dvp";	
 	public final static String CLOUD_NIC_MASK = "cloud.nic.mask";
+    public final static String CLOUD_ZONE = "cloud.zone";
 }
diff --git a/vmware-base/src/com/cloud/hypervisor/vmware/mo/DatacenterMO.java b/vmware-base/src/com/cloud/hypervisor/vmware/mo/DatacenterMO.java
index 0a3e20ba8aa..cabb60abc5d 100755
--- a/vmware-base/src/com/cloud/hypervisor/vmware/mo/DatacenterMO.java
+++ b/vmware-base/src/com/cloud/hypervisor/vmware/mo/DatacenterMO.java
@@ -488,4 +488,9 @@ public class DatacenterMO extends BaseMO {
         dvSwitchMor = _context.getVimClient().getDecendentMoRef(networkFolderMor, "VmwareDistributedVirtualSwitch", dvSwitchName);
         return dvSwitchMor;
     }
+
+    public boolean ensureCustomFieldDef(String fieldName) throws Exception {
+        CustomFieldsManagerMO cfmMo = new CustomFieldsManagerMO(_context, _context.getServiceContent().getCustomFieldsManager());
+        return cfmMo.ensureCustomFieldDef("Datacenter", fieldName) > 0;
+    }
 }