diff --git a/docs/routing/dynamic-routes.md b/docs/routing/dynamic-routes.md
index b69af21ae98f..483de9d1732f 100644
--- a/docs/routing/dynamic-routes.md
+++ b/docs/routing/dynamic-routes.md
@@ -60,7 +60,7 @@ Client-side navigations to a dynamic route can be handled with [`next/link`](/do
 
 Dynamic routes can be extended to catch all paths by adding three dots (`...`) inside the brackets. For example:
 
-- `pages/post/[...slug]` matches `/post/a`, but also `post/a/b`, `post/a/b/c` and so on.
+- `pages/post/[...slug].js` matches `/post/a`, but also `post/a/b`, `post/a/b/c` and so on.
 
 Matched parameters will be sent as a query parameter (`slug` in the example) to the page, and it will always be an array, so, the path `/post/a` will have the following `query` object:
 
diff --git a/docs/routing/introduction.md b/docs/routing/introduction.md
index 1b92f8337825..4191ff1d4ece 100644
--- a/docs/routing/introduction.md
+++ b/docs/routing/introduction.md
@@ -30,7 +30,7 @@ To match a dynamic segment you can use the bracket syntax. This allows you to ma
 
 - `pages/blog/[slug].js` → `/blog/:slug` (`/blog/hello-world`)
 - `pages/[username]/settings.js` → `/:username/settings` (`/foo/settings`)
-- `pages/post/[...all]` → `/post/*` (`/post/2020/id/title`)
+- `pages/post/[...all].js` → `/post/*` (`/post/2020/id/title`)
 
 ## Linking between pages