diff --git a/src/main/java/net/onrc/onos/core/topology/ITopologyService.java b/src/main/java/net/onrc/onos/core/topology/ITopologyService.java
index 26b6212..ab32130 100644
--- a/src/main/java/net/onrc/onos/core/topology/ITopologyService.java
+++ b/src/main/java/net/onrc/onos/core/topology/ITopologyService.java
@@ -5,7 +5,8 @@
 /**
  * Interface for providing the topology service to other modules.
  */
-public interface ITopologyService extends IFloodlightService {
+public interface ITopologyService extends IFloodlightService,
+                                        ITopologyReplicationWriter {
     /**
      * Allows a module to get a reference to the global topology object.
      *