diff --git a/src/main/java/net/onrc/onos/ofcontroller/onoslistener/OnosPublisher.java b/src/main/java/net/onrc/onos/ofcontroller/onoslistener/OnosPublisher.java
index 01ca69b..db18296 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/onoslistener/OnosPublisher.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/onoslistener/OnosPublisher.java
@@ -27,6 +27,7 @@
 import net.floodlightcontroller.linkdiscovery.internal.LinkStorageImpl;
 import net.floodlightcontroller.routing.Link;
 import net.floodlightcontroller.threadpool.IThreadPoolService;
+import net.onrc.onos.ofcontroller.core.IOFSwitchPortListener;
 import net.onrc.onos.ofcontroller.core.ISwitchStorage;
 import net.onrc.onos.ofcontroller.core.INetMapStorage.DM_OPERATION;
 import net.onrc.onos.ofcontroller.core.INetMapTopologyObjects.ISwitchObject;
@@ -43,7 +44,7 @@
 import net.onrc.onos.util.IDBConnection;
 import net.onrc.onos.util.LocalTopologyEventListener;
 
-public class OnosPublisher implements IDeviceListener, IOFSwitchListener,
+public class OnosPublisher implements IDeviceListener, IOFSwitchListener, IOFSwitchPortListener,
 		ILinkDiscoveryListener, IFloodlightModule {
 	
 	protected IDeviceStorage devStore;