diff --git a/src/mqtt_client_wrapper.cpp b/src/mqtt_client_wrapper.cpp
index 42df80a..266f23a 100644
--- a/src/mqtt_client_wrapper.cpp
+++ b/src/mqtt_client_wrapper.cpp
@@ -8,7 +8,7 @@ extern std::atomic<bool> g_running;
 
 std::atomic<std::string> g_dispatch_id{""};
 auto last_heartbeat = std::chrono::steady_clock::now();
-auto heartbeat_interval = std::chrono::milliseconds(static_cast<int>(cfg.keep_alive * 0.9));
+auto heartbeat_interval = std::chrono::milliseconds(static_cast<int>(g_app_config.mqtt.keep_alive * 0.9));
 
 static void send_heartbeat()
 {