diff --git a/extra/mail_handler/rdm-mailhandler.rb b/extra/mail_handler/rdm-mailhandler.rb
index 7784f48..03762e7 100644
--- a/extra/mail_handler/rdm-mailhandler.rb
+++ b/extra/mail_handler/rdm-mailhandler.rb
@@ -107,12 +107,12 @@ Overrides:
   * project, tracker, status, priority, category, assigned_to, fixed_version,
     start_date, due_date, estimated_hours, done_ratio
   * custom fields names with underscores instead of spaces (case insensitive)
-  Example: --allow_override=project,priority,my_custom_field
+  Example: --allow-override=project,priority,my_custom_field
 
   If the --project option is not set, project is overridable by default for
   emails that create new issues.
 
-  You can use --allow_override=all to allow all attributes to be overridable.
+  You can use --allow-override=all to allow all attributes to be overridable.
 
 Examples:
   No project specified, emails MUST contain the 'Project' keyword, otherwise