diff --git a/akka-actor/src/main/scala/akka/actor/FSM.scala b/akka-actor/src/main/scala/akka/actor/FSM.scala
index bc1d0929cb..6d4d0f11d7 100644
--- a/akka-actor/src/main/scala/akka/actor/FSM.scala
+++ b/akka-actor/src/main/scala/akka/actor/FSM.scala
@@ -224,6 +224,7 @@ object FSM {
  * Finite State Machine actor trait. Use as follows:
  *
  * <pre>
+ *   object A {
  *     trait State
  *     case class One extends State
  *     case class Two extends State