diff --git a/doc/tutorial/ApiType.lhs b/doc/tutorial/ApiType.lhs
index 8c2629f9..bbe1da43 100644
--- a/doc/tutorial/ApiType.lhs
+++ b/doc/tutorial/ApiType.lhs
@@ -149,10 +149,15 @@ type UserAPI5 = "user" :> Capture "userid" Integer :> Get '[JSON] User
                 -- except that we explicitly say that "userid"
                 -- must be an integer
 
-           :<|> "user" :> Capture "userid" Integer :> Delete '[] ()
+           :<|> "user" :> Capture "userid" Integer :> DeleteNoContent '[JSON] NoContent
                 -- equivalent to 'DELETE /user/:userid'
 ```
 
+In the second case, `DeleteNoContent` specifies a 204 response code,
+`JSON` specifies the content types on which the handler will match,
+and `NoContent` is a Haskell type isomorphic to `()` used to represent
+a trivial piece of information.
+
 ### `QueryParam`, `QueryParams`, `QueryFlag`
 
 `QueryParam`, `QueryParams` and `QueryFlag` are about query string