diff --git a/akka-actor/src/main/scala/akka/util/ByteIterator.scala b/akka-actor/src/main/scala/akka/util/ByteIterator.scala
index 138c549d0b..4aa242f38c 100644
--- a/akka-actor/src/main/scala/akka/util/ByteIterator.scala
+++ b/akka-actor/src/main/scala/akka/util/ByteIterator.scala
@@ -352,6 +352,10 @@ object ByteIterator {
   }
 }
 
+/**
+ * An iterator over a ByteString.
+ */
+
 abstract class ByteIterator extends BufferedIterator[Byte] {
   def isIdenticalTo(that: Iterator[Byte]): Boolean