diff --git a/src/main/java/net/floodlightcontroller/topology/ITopologyService.java b/src/main/java/net/floodlightcontroller/topology/ITopologyService.java
index b4665ab3c72c26e6a2d8a4d80c6d0cc78750ce54..cc45edca8b2bace5192fd4ab10e359117ad765cd 100644
--- a/src/main/java/net/floodlightcontroller/topology/ITopologyService.java
+++ b/src/main/java/net/floodlightcontroller/topology/ITopologyService.java
@@ -24,10 +24,11 @@ import org.projectfloodlight.openflow.types.DatapathId;
 import org.projectfloodlight.openflow.types.OFPort;
 
 import net.floodlightcontroller.core.module.IFloodlightService;
+import net.floodlightcontroller.core.types.NodePortTuple;
 import net.floodlightcontroller.routing.Link;
 
 public interface ITopologyService extends IFloodlightService  {
-
+	
 	/*******************************************************
 	 * GENERAL TOPOLOGY FUNCTIONS
 	 *******************************************************/