diff --git a/src/runtime/sys_types.h b/src/runtime/sys_types.h
index 117fae2af1..cffdaa9f68 100644
--- a/src/runtime/sys_types.h
+++ b/src/runtime/sys_types.h
@@ -7,7 +7,7 @@
 #else
 	#ifdef amd64_darwin
 		#include "amd64_darwin.h"
+	#else
+		You_need_to_write_the_syscall_header
 	#endif
-#else
-	You_need_to_write_the_syscall_header
 #endif