1 files changed, 1 insertions, 0 deletions
diff --git a/ToDo b/ToDo
index 1fa2f396ae..1014ab51c7 100644
--- a/ToDo
+++ b/ToDo
@@ -15,6 +15,7 @@ Language Spec.
 
 Hacking Interpreter
 
+* RUBYOPT environment variable
 * non-blocking open (e.g. named pipe) for thread
 * avoid blocking with gethostbyname/gethostbyaddr
 * objectify interpreters