diff --git a/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java b/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java
index 1df7eb5..31b8923 100644
--- a/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java
+++ b/src/main/java/net/floodlightcontroller/linkdiscovery/ILinkDiscovery.java
@@ -8,7 +8,7 @@
 
     @JsonSerialize(using=ToStringSerializer.class)
     public enum UpdateOperation {
-    	LINK_ADDED("Link Added"),
+    	LINK_ADDED("Link Added"), // Operation Added by ONOS
         LINK_UPDATED("Link Updated"),
         LINK_REMOVED("Link Removed"),
         SWITCH_UPDATED("Switch Updated"),