diff --git a/src/main/java/net/onrc/onos/core/topology/PortImpl.java b/src/main/java/net/onrc/onos/core/topology/PortImpl.java
index 792d9f1..9332764 100644
--- a/src/main/java/net/onrc/onos/core/topology/PortImpl.java
+++ b/src/main/java/net/onrc/onos/core/topology/PortImpl.java
@@ -114,4 +114,15 @@
                 getSwitch().getDpid(),
                 getNumber());
     }
+
+
+    /**
+     * Returns the type of topology object.
+     *
+     * @return the type of the topology object
+     */
+    @Override
+    public String getType() {
+        throw new UnsupportedOperationException("Not implemented yet");
+    }
 }