diff --git a/luna/include/luna/Check.h b/luna/include/luna/Check.h
index faf75bd7..897c4486 100644
--- a/luna/include/luna/Check.h
+++ b/luna/include/luna/Check.h
@@ -25,3 +25,5 @@
 
 #define unreachable()                                                                                                  \
     __check_failed(__FILE__, STRINGIZE_VALUE_OF(__LINE__), __PRETTY_FUNCTION__, "Reached unreachable code")
+
+#define todo() __check_failed(__FILE__, STRINGIZE_VALUE_OF(__LINE__), __PRETTY_FUNCTION__, "Reached a TODO!")