diff --git a/mattermost.el b/mattermost.el
index dca8d2b..0b82433 100644
--- a/mattermost.el
+++ b/mattermost.el
@@ -19,6 +19,8 @@
   :group 'mattermost
   :type 'string)
 
+;; ToDo: internal variables should be prefixed with mattermost--
+;; instead?
 (defvar mattermost-users-plist '()
   "A plist with the server users by id")