diff --git a/server/src/com/cloud/vm/UserVmManagerImpl.java b/server/src/com/cloud/vm/UserVmManagerImpl.java
index a734d44c800..a55c6f8fb81 100755
--- a/server/src/com/cloud/vm/UserVmManagerImpl.java
+++ b/server/src/com/cloud/vm/UserVmManagerImpl.java
@@ -1026,6 +1026,7 @@ public class UserVmManagerImpl extends ManagerBase implements UserVmManager, Use
 
         Network oldDefaultNetwork = null;
         oldDefaultNetwork = _networkModel.getDefaultNetworkForVm(vmId);
+        String oldNicIdString = Long.toString(_networkModel.getDefaultNic(vmId).getId());
         long oldNetworkOfferingId = -1L;
 
         if(oldDefaultNetwork!=null) {
@@ -1065,13 +1066,13 @@ public class UserVmManagerImpl extends ManagerBase implements UserVmManager, Use
             String nicIdString = Long.toString(nic.getId());
             long newNetworkOfferingId = network.getNetworkOfferingId();
             UsageEventUtils.publishUsageEvent(EventTypes.EVENT_NETWORK_OFFERING_REMOVE, vmInstance.getAccountId(), vmInstance.getDataCenterId(),
-                    vmInstance.getId(), nicIdString, oldNetworkOfferingId, null, 1L, VirtualMachine.class.getName(), vmInstance.getUuid());
+                    vmInstance.getId(), oldNicIdString, oldNetworkOfferingId, null, 1L, VirtualMachine.class.getName(), vmInstance.getUuid());
             UsageEventUtils.publishUsageEvent(EventTypes.EVENT_NETWORK_OFFERING_ASSIGN, vmInstance.getAccountId(), vmInstance.getDataCenterId(),
                      vmInstance.getId(), nicIdString, newNetworkOfferingId, null, 1L, VirtualMachine.class.getName(), vmInstance.getUuid());
             UsageEventUtils.publishUsageEvent(EventTypes.EVENT_NETWORK_OFFERING_REMOVE, vmInstance.getAccountId(), vmInstance.getDataCenterId(),
                     vmInstance.getId(), nicIdString, newNetworkOfferingId, null, 0L, VirtualMachine.class.getName(), vmInstance.getUuid());
             UsageEventUtils.publishUsageEvent(EventTypes.EVENT_NETWORK_OFFERING_ASSIGN, vmInstance.getAccountId(), vmInstance.getDataCenterId(),
-                     vmInstance.getId(), nicIdString, oldNetworkOfferingId, null, 0L, VirtualMachine.class.getName(), vmInstance.getUuid());
+                     vmInstance.getId(), oldNicIdString, oldNetworkOfferingId, null, 0L, VirtualMachine.class.getName(), vmInstance.getUuid());
             return _vmDao.findById(vmInstance.getId());
         }