diff --git a/doc/mainpage.md b/doc/mainpage.md
index 9a676f687..9b248e79b 100644
--- a/doc/mainpage.md
+++ b/doc/mainpage.md
@@ -68,6 +68,7 @@ modules.
 * @ref vulkan-extensions
 * @ref howto-remote-driver
 * @ref tracing
+* @ref metrics
 
 ## Source layout