diff --git a/p2p/simulations/events.go b/p2p/simulations/events.go
index c49a72b596..9b2a990e07 100644
--- a/p2p/simulations/events.go
+++ b/p2p/simulations/events.go
@@ -59,7 +59,7 @@ type Event struct {
 	// Msg is set if the type is EventTypeMsg
 	Msg *Msg `json:"msg,omitempty"`
 
-	//
+	//Optionally provide data (currently for simulation frontends only)
 	Data interface{} `json:"data"`
 }