Why Json Marshal to activemq is BytesMessage?

[Rural Hunter]

Hi,

I'm using camel 2.12.2 with this route:
....marshal().json(JsonLibrary.Gson).to("activemq:queue:completed")
When I process the message in other application, I found the message in 
the queue is BytesMessage instead of expected TextMessage. I have to 
force it to TextMessage by adding parameter "?jmsMessageType=Text" in 
the queue name. Is that a correct behavior to store json as BytesMessage?