diff --git a/pkg/apis/authentication/types.go b/pkg/apis/authentication/types.go
index a33dfe98985..77aaa472e1d 100644
--- a/pkg/apis/authentication/types.go
+++ b/pkg/apis/authentication/types.go
@@ -136,8 +136,9 @@ type TokenRequestSpec struct {
 
 	// BoundObjectRef is a reference to an object that the token will be bound to.
 	// The token will only be valid for as long as the bound object exists.
-	// NOTE: The API server will validate the BoundObjectRef, but other audiences
-	// may not. Keep ExpirationSeconds small if you want prompt revocation.
+	// NOTE: The API server's TokenReview endpoint will validate the
+	// BoundObjectRef, but other audiences may not. Keep ExpirationSeconds
+	// small if you want prompt revocation.
 	BoundObjectRef *BoundObjectReference
 }