diff --git a/sonoff/sonoff_post.h b/sonoff/sonoff_post.h
index 4301971dd..0143234b6 100644
--- a/sonoff/sonoff_post.h
+++ b/sonoff/sonoff_post.h
@@ -33,11 +33,8 @@ void WifiWpsStatusCallback(wps_cb_status status);
 }
 #endif
 
-#ifdef USE_KNX
 #include <esp-knx-ip.h>
-
 void KNX_CB_Action(message_t const &msg, void *arg);
-#endif  // USE_KNX
 
 #define USE_DHT                               // Default DHT11 sensor needs no external library