diff --git a/apps/openstackswitching/api/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingService.java b/apps/openstackswitching/api/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingService.java
index 1ed4f6f..8960dcd 100644
--- a/apps/openstackswitching/api/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingService.java
+++ b/apps/openstackswitching/api/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingService.java
@@ -34,13 +34,14 @@
     /**
      * Removes flow rules corresponding to the port removed by Openstack.
      *
+     * @param uuid UUID
      */
     void deletePort(String uuid);
 
     /**
      * Updates flow rules corresponding to the port information updated by Openstack.
      *
-     * @param openstackPort
+     * @param openstackPort OpenStack port
      */
     void updatePort(OpenstackPort openstackPort);