diff --git a/components/rpc/include/IRPCServer.h b/components/rpc/include/IRPCServer.h
index 9de70a1..ed91386 100644
--- a/components/rpc/include/IRPCServer.h
+++ b/components/rpc/include/IRPCServer.h
@@ -6,7 +6,9 @@
 #define IRPCSERVER_H
 
 class IRPCServer {
-
+public:
+    virtual ~IRPCServer() = default;
+    virtual int send_msg(char* buffer, uint32_t length) const = 0;
 };
 
 #endif //IRPCSERVER_H