diff --git a/Components/9918/Implementation/9918Base.hpp b/Components/9918/Implementation/9918Base.hpp
index 5003527ae..9ecea6943 100644
--- a/Components/9918/Implementation/9918Base.hpp
+++ b/Components/9918/Implementation/9918Base.hpp
@@ -421,7 +421,8 @@ class Base {
 */
 
 #define slot(n)	\
-		if(use_end && end == n) return;\
+		if(use_end && end == n) return;	\
+		[[fallthrough]];				\
 		case n
 
 #define external_slot(n)	\