diff --git a/staging/src/k8s.io/apiserver/pkg/features/kube_features.go b/staging/src/k8s.io/apiserver/pkg/features/kube_features.go
index 18b04d234cc..2faeee8172a 100644
--- a/staging/src/k8s.io/apiserver/pkg/features/kube_features.go
+++ b/staging/src/k8s.io/apiserver/pkg/features/kube_features.go
@@ -198,6 +198,13 @@ const (
 	// document.
 	StorageVersionHash featuregate.Feature = "StorageVersionHash"
 
+	// owner: @aramase, @enj, @nabokihms
+	// kep: https://kep.k8s.io/3331
+	// alpha: v1.29
+	//
+	// Enables Structured Authentication Configuration
+	StructuredAuthenticationConfiguration featuregate.Feature = "StructuredAuthenticationConfiguration"
+
 	// owner: @wojtek-t
 	// alpha: v1.15
 	// beta: v1.16
@@ -278,6 +285,8 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	StorageVersionHash: {Default: true, PreRelease: featuregate.Beta},
 
+	StructuredAuthenticationConfiguration: {Default: false, PreRelease: featuregate.Alpha},
+
 	WatchBookmark: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
 
 	InPlacePodVerticalScaling: {Default: false, PreRelease: featuregate.Alpha},