diff --git a/apps/bgprouter/src/main/java/org/onosproject/bgprouter/BgpRouter.java b/apps/bgprouter/src/main/java/org/onosproject/bgprouter/BgpRouter.java
index 975beeb..f38d1cb 100644
--- a/apps/bgprouter/src/main/java/org/onosproject/bgprouter/BgpRouter.java
+++ b/apps/bgprouter/src/main/java/org/onosproject/bgprouter/BgpRouter.java
@@ -260,6 +260,8 @@
                 .withFlag(ForwardingObjective.Flag.SPECIFIC);
 
         if (nextId == null) {
+            // Route withdraws are not specified with next hops. Generating
+            // dummy treatment as there is no equivalent nextId info.
             fwdBuilder.withTreatment(DefaultTrafficTreatment.builder().build());
         } else {
             fwdBuilder.nextStep(nextId);