diff --git a/src/main/java/org/onosproject/segmentrouting/Tunnel.java b/src/main/java/org/onosproject/segmentrouting/Tunnel.java
index c56ae70..783d253 100644
--- a/src/main/java/org/onosproject/segmentrouting/Tunnel.java
+++ b/src/main/java/org/onosproject/segmentrouting/Tunnel.java
@@ -47,6 +47,7 @@
     /**
      * Sets group ID for the tunnel.
      *
+     * @param groupId group identifier
      */
     void setGroupId(int groupId);