diff --git a/README.md b/README.md
index f26edc0..4cd383c 100644
--- a/README.md
+++ b/README.md
@@ -131,6 +131,19 @@ class GetPhotoEdit // parent: GetPhoto
 
     GET /photo/1/edit
 
+> **Tip:**
+>
+> For a URL with a parameter in the middle (like `/photo/1/edit`), 
+> AutoRoute needs to be able to determine that `1` is a parameter 
+> and not a namespace segment. It does this by checking if a parent 
+> class exists that handles the same path without the tail segment.
+>
+> In this example, `Project\Http\Photo\GetPhoto` with the `int $photoId` 
+> parameter must exist for `Project\Http\Photo\Edit\GetPhotoEdit` 
+> to work correctly. This allows the router to understand that in 
+> `/photo/1/edit`, the `1` corresponds to the `$photoId` parameter 
+> and `edit` is a static path segment.
+
 Finally, a request for the root URL ...
 
     GET /