diff --git a/tasmota/StackThunk_light.cpp b/tasmota/StackThunk_light.cpp
index 3c0d91bcf..bbd60fb50 100644
--- a/tasmota/StackThunk_light.cpp
+++ b/tasmota/StackThunk_light.cpp
@@ -26,6 +26,7 @@
 */
 
 #include "my_user_config.h"
+#include "tasmota_configurations.h"
 
 #include <stdint.h>
 #include <stdlib.h>