diff --git a/staging/src/k8s.io/api/autoscaling/v2beta2/types.go b/staging/src/k8s.io/api/autoscaling/v2beta2/types.go
index 6e5b8f68c11..ae7fa173ded 100644
--- a/staging/src/k8s.io/api/autoscaling/v2beta2/types.go
+++ b/staging/src/k8s.io/api/autoscaling/v2beta2/types.go
@@ -169,7 +169,7 @@ type HPAScalingRules struct {
 	// - For scale up: 0 (i.e. no stabilization is done).
 	// - For scale down: 300 (i.e. the stabilization window is 300 seconds long).
 	// +optional
-	StabilizationWindowSeconds *int32 `json:"stabilizationWindowSeconds" protobuf:"varint,3,opt,name=stabilizationWindowSeconds"`
+	StabilizationWindowSeconds *int32 `json:"stabilizationWindowSeconds,omitempty" protobuf:"varint,3,opt,name=stabilizationWindowSeconds"`
 	// selectPolicy is used to specify which policy should be used.
 	// If not set, the default value MaxPolicySelect is used.
 	// +optional