diff --git a/src/media_server_app.h b/src/media_server_app.h
index 96f16a2..e44b0bc 100644
--- a/src/media_server_app.h
+++ b/src/media_server_app.h
@@ -2,6 +2,8 @@
 
 #include <string>
 
+#include "graph_manager.h"
+
 namespace rk3588 {
 
 class MediaServerApp {
@@ -12,6 +14,7 @@ public:
 
 private:
     std::string config_path_;
+    GraphManager graph_manager_{};
 };
 
 }  // namespace rk3588