diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/floatingip/impl/FloatingIpManager.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/floatingip/impl/FloatingIpManager.java
index 9fd73f5..a8b4edf 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/floatingip/impl/FloatingIpManager.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/floatingip/impl/FloatingIpManager.java
@@ -21,6 +21,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Set;
+import java.util.UUID;
 
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
@@ -102,7 +103,8 @@
                 .register(FloatingIp.class, FloatingIpId.class,
                           TenantNetworkId.class, TenantId.class,
                           FloatingIp.Status.class, RouterId.class,
-                          VirtualPortId.class, DefaultFloatingIp.class);
+                          VirtualPortId.class, DefaultFloatingIp.class,
+                          UUID.class);
         floatingIpStore = storageService
                 .<FloatingIpId, FloatingIp>eventuallyConsistentMapBuilder()
                 .withName(FLOATINGIPSTORE).withSerializer(serializer)