diff --git a/src/mqtt_client.cpp b/src/mqtt_client.cpp
index a1154b6..492e3d0 100644
--- a/src/mqtt_client.cpp
+++ b/src/mqtt_client.cpp
@@ -2,6 +2,7 @@
 #include <iostream>
 #include <thread>
 #include <chrono>
+#include <future>
 
 extern std::atomic<bool> g_running;