diff --git a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/SnatService.java b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/SnatService.java
index dd6f811..dd95d34 100644
--- a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/SnatService.java
+++ b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/SnatService.java
@@ -78,6 +78,7 @@
      * @param matchVni the vni of L3 network
      * @param srcIP source ip
      * @param dstIP destination ip
+     * @param prefix prefix
      * @param type the operation type of the flow rules
      */
     void programSnatSameSegmentUploadControllerRules(DeviceId deviceId,
diff --git a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/util/IpUtil.java b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/util/IpUtil.java
index 82865c5..22eb9db 100644
--- a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/util/IpUtil.java
+++ b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/util/IpUtil.java
@@ -30,7 +30,7 @@
      *
      * @param srcIp source Ip
      * @param dstIp destination
-     * @param masks netmask length
+     * @param mask netmask length
      * @return boolean
      */
     public static boolean checkSameSegment(IpAddress srcIp, IpAddress dstIp,