diff --git a/README.rst b/README.rst
index d666ecd..7a47a4e 100644
--- a/README.rst
+++ b/README.rst
@@ -97,3 +97,6 @@ Example config:
   
   # Default subreddit
   subreddit=CollegeBasketball
+
+RTV will attempt to use the system's default text editor when writing comments.
+Set the environment variable ``$RTV_EDITOR`` to change the default editor.