diff --git a/runtime.c b/runtime.c
index 2a62e131..0f307b32 100644
--- a/runtime.c
+++ b/runtime.c
@@ -894,8 +894,10 @@ string_type Cyc_substring(object str, object start, object end) {
 }
 
 object Cyc_command_line_arguments(object cont) {
-  //Cyc_rt_raise_msg("not implemented yet");
-  //return boolean_f;
+
+  // TODO: store argc/argv somewhere (probably globals, unfortunately) and then
+  // use them here to pack up a list of strings
+
   make_string(s, "TODO");
   make_cons(l, &s, nil);
   return_funcall1(cont, &l);