diff --git a/kernel/yosys.h b/kernel/yosys.h
index 62f76a63f..c922faf26 100644
--- a/kernel/yosys.h
+++ b/kernel/yosys.h
@@ -157,10 +157,10 @@ extern Tcl_Obj *Tcl_ObjSetVar2(Tcl_Interp *interp, Tcl_Obj *part1Ptr, Tcl_Obj *p
 
 #if __cplusplus >= 201703L
 #  define YS_FALLTHROUGH [[fallthrough]];
-#elif defined(__GNUC__)
-#  define YS_FALLTHROUGH [[gnu::fallthrough]];
 #elif defined(__clang__)
 #  define YS_FALLTHROUGH [[clang::fallthrough]];
+#elif defined(__GNUC__)
+#  define YS_FALLTHROUGH [[gnu::fallthrough]];
 #else
 #  define YS_FALLTHROUGH
 #endif