diff --git a/code/espurna/relay.cpp b/code/espurna/relay.cpp
index 64e453a162..d515a3e0ae 100644
--- a/code/espurna/relay.cpp
+++ b/code/espurna/relay.cpp
@@ -21,6 +21,7 @@ Copyright (C) 2019-2021 by Maxim Prokhorov <prokhorov dot max at outlook dot com
 
 #include "mqtt.h"
 #include "relay.h"
+#include "fan.h"
 #include "tuya.h"
 #include "rpc.h"
 #include "rtcmem.h"