diff --git a/dbus/message.cc b/dbus/message.cc
index 486538ab519e52..43fb3bb8b59371 100644
--- a/dbus/message.cc
+++ b/dbus/message.cc
@@ -404,7 +404,7 @@ Response* Response::CreateEmpty() {
 // ErrorResponse implementation.
 //
 
-ErrorResponse::ErrorResponse() : Message() {
+ErrorResponse::ErrorResponse() : Response() {
 }
 
 ErrorResponse* ErrorResponse::FromRawMessage(DBusMessage* raw_message) {
diff --git a/dbus/message.h b/dbus/message.h
index 4683abeba475e9..3a28fb0b57ebc6 100644
--- a/dbus/message.h
+++ b/dbus/message.h
@@ -200,16 +200,17 @@ class Response : public Message {
   // must delete the returned object. Useful for testing.
   static Response* CreateEmpty();
 
- private:
+ protected:
   // Creates a Response message. The internal raw message is NULL.
   Response();
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(Response);
 };
 
 // ErrorResponse is a type of message used to return an error to the
 // caller of a method.
-class ErrorResponse: public Message {
+class ErrorResponse: public Response {
  public:
   // Returns a newly created Response from the given raw message of the
   // type DBUS_MESSAGE_TYPE_METHOD_RETURN. The caller must delete the