diff --git a/reactos/ntoskrnl/include/internal/trap_x.h b/reactos/ntoskrnl/include/internal/trap_x.h
index a6c97c7bcbc..bf2df78127d 100644
--- a/reactos/ntoskrnl/include/internal/trap_x.h
+++ b/reactos/ntoskrnl/include/internal/trap_x.h
@@ -9,11 +9,14 @@
 #ifdef __GNUC__
 #if __GNUC__ * 100 + __GNUC_MINOR__ >= 405
 #define UNREACHABLE __builtin_unreachable()
-#endif
 #else
 DECLSPEC_NORETURN void exit(int s) {exit(s);}
 #define UNREACHABLE exit(0)
 #endif
+#else /* not __GNUC__ */
+DECLSPEC_NORETURN void exit(int s) {exit(s);}
+#define UNREACHABLE exit(0)
+#endif
 
 //
 // Debug Macros