diff --git a/settings.hpp.in b/settings.hpp.in
index e89f312..f0ddd03 100644
--- a/settings.hpp.in
+++ b/settings.hpp.in
@@ -1,3 +1,4 @@
 #pragma once
 
 #cmakedefine LOOKUP_GPIO_BASE
+#cmakedefine ID_LED_GROUP "@ID_LED_GROUP@"