diff --git a/akka-stream/src/main/scala/akka/stream/impl/ReactiveStreamsCompliance.scala b/akka-stream/src/main/scala/akka/stream/impl/ReactiveStreamsCompliance.scala
index d945d58da5..bdd6d437d8 100644
--- a/akka-stream/src/main/scala/akka/stream/impl/ReactiveStreamsCompliance.scala
+++ b/akka-stream/src/main/scala/akka/stream/impl/ReactiveStreamsCompliance.scala
@@ -20,7 +20,7 @@ import akka.stream.SubscriptionWithCancelException
     "can not subscribe the same subscriber multiple times (see reactive-streams specification, rules 1.10 and 2.12)"
 
   final val SupportsOnlyASingleSubscriber =
-    "only supports one subscriber (which is allowed, see reactive-streams specification, rule 1.12)"
+    "only supports one subscriber (which is allowed, see reactive-streams specification, rule 1.11)"
 
   final val NumberOfElementsInRequestMustBePositiveMsg =
     "The number of requested elements must be > 0 (see reactive-streams specification, rule 3.9)"