diff --git a/docs/how-to-guides/index.md b/docs/how-to-guides/index.md
index 0baf5ac493d..2b7f34fc4b9 100644
--- a/docs/how-to-guides/index.md
+++ b/docs/how-to-guides/index.md
@@ -5,7 +5,7 @@
 TODO: Write the following contents.
 
 - Create an Autoware package
-- Add a message
+- Add a custom ROS message
 - Debug Autoware
 - Integrate Autoware with a real vehicle
 - etc.