diff --git a/docs/source/federation/advanced-features.md b/docs/source/federation/advanced-features.md
index 6ca53225b70..08f81b6903a 100644
--- a/docs/source/federation/advanced-features.md
+++ b/docs/source/federation/advanced-features.md
@@ -92,7 +92,7 @@ type Review {
   author: User @provides(fields: "username")
 }
 
-type User @key(fields: "id") {
+extend type User @key(fields: "id") {
   id: ID! @external
   username: String @external
 }