diff --git a/server/src/com/cloud/network/rules/RulesManagerImpl.java b/server/src/com/cloud/network/rules/RulesManagerImpl.java
index 4f0e06fd6ce..e19581789f6 100755
--- a/server/src/com/cloud/network/rules/RulesManagerImpl.java
+++ b/server/src/com/cloud/network/rules/RulesManagerImpl.java
@@ -545,8 +545,9 @@ public class RulesManagerImpl implements RulesManager, RulesService, Manager {
                 List<IdentityProxy> idList = new ArrayList<IdentityProxy>();
                 idList.add(new IdentityProxy(ipAddress, ipAddress.getId(), "ipId"));
                 idList.add(new IdentityProxy(oldIP, oldIP.getId(), "oldipId"));
+                idList.add(new IdentityProxy("vm_instance", vmId, "vmId"));
                 throw new InvalidParameterValueException("Failed to enable static nat for the ip address with specified ipId" +
-                        " as vm with id: " + vmId + " is already associated with ip with specified oldipId", idList);
+                        " as vm with specified vmId is already associated with ip with specified oldipId", idList);
             }
             // unassign old static nat rule
             s_logger.debug("Disassociating static nat for ip " + oldIP);