diff --git a/akka-http-core/src/main/scala/akka/http/scaladsl/model/HttpHeader.scala b/akka-http-core/src/main/scala/akka/http/scaladsl/model/HttpHeader.scala
index ecd3c5341a6..bc73e0527db 100644
--- a/akka-http-core/src/main/scala/akka/http/scaladsl/model/HttpHeader.scala
+++ b/akka-http-core/src/main/scala/akka/http/scaladsl/model/HttpHeader.scala
@@ -92,7 +92,7 @@ object HttpHeader {
       case h if clazz.isInstance(h) ⇒ return OptionVal.Some[T](h.asInstanceOf[T])
       case _                        ⇒ // continue ...
     }
-    OptionVal.None.asInstanceOf[OptionVal[T]]
+    OptionVal.None
   }
 
   sealed trait ParsingResult {