diff --git a/plugins/net_plugin/net_plugin.cpp b/plugins/net_plugin/net_plugin.cpp
index f346a41db28..8aebd8b55aa 100644
--- a/plugins/net_plugin/net_plugin.cpp
+++ b/plugins/net_plugin/net_plugin.cpp
@@ -1441,6 +1441,8 @@ namespace eosio {
       //
       // 3  my head block num < peer head block num - update sync state and send a catchup request
       // 4  my head block num >= peer block num send a notice catchup if this is not the first generation
+      //    4.1 if peer appears to be on a different fork ( our_id_for( msg.head_num ) != msg.head_id )
+      //        then request peer's blocks
       //
       //-----------------------------