diff --git a/sonoff/user_config.h b/sonoff/user_config.h
index f5f7acdc7..a355796a7 100644
--- a/sonoff/user_config.h
+++ b/sonoff/user_config.h
@@ -138,6 +138,9 @@
   #define HOME_ASSISTANT_DISCOVERY_PREFIX "homeassistant"  // Home Assistant discovery prefix
   #define HOME_ASSISTANT_DISCOVERY_ENABLE 0      // [SetOption19] Home Assistant Discovery (0 = Disable, 1 = Enable)
 
+// -- KNX IP Protocol -----------------------------
+#define USE_KNX                                  // Enable KNX IP Protocol Support  
+
 // -- HTTP ----------------------------------------
 #define USE_WEBSERVER                            // Enable web server and wifi manager (+66k code, +8k mem) - Disable by //
   #define WEB_SERVER           2                 // [WebServer] Web server (0 = Off, 1 = Start as User, 2 = Start as Admin)