diff --git a/libc-bottom-half/sources/__main_void.c b/libc-bottom-half/sources/__main_void.c
index 9f46419b..ef10108b 100644
--- a/libc-bottom-half/sources/__main_void.c
+++ b/libc-bottom-half/sources/__main_void.c
@@ -2,6 +2,9 @@
 #include <stdlib.h>
 #include <sysexits.h>
 
+// TODO: This file can be dropped when we drop the support of LLVM
+// versions w/o crt2-command.o support.
+
 // The user's `main` function, expecting arguments.
 //
 // Note that we make this a weak symbol so that it will have a