diff --git a/src/net/async_server.hpp b/src/net/async_server.hpp
index 2adf5e2002ada3a3d8fa6c375bb83a4f32f80221..e497f520ea5edb146c9336e6ca562d80c74dd51e 100644
--- a/src/net/async_server.hpp
+++ b/src/net/async_server.hpp
@@ -28,8 +28,6 @@ public:
     async_server_socket(auto_fd &&fd);
     ~async_server_socket();
 
-	void cb_ev(::ev::io &w, int events);
-
 	accept_handler_type get_accept_handler() const;
 	void set_accept_handler(const accept_handler_type &value);