diff --git a/ipc/glue/ProtocolUtils.h b/ipc/glue/ProtocolUtils.h
index 5c4645b80fb9..421358cf906e 100644
--- a/ipc/glue/ProtocolUtils.h
+++ b/ipc/glue/ProtocolUtils.h
@@ -191,7 +191,7 @@ typedef IPCMessageStart ProtocolId;
 /**
  * All RPC protocols should implement this interface.
  */
-class IProtocol : protected MessageListener
+class IProtocol : public MessageListener
 {
 public:
     /**