diff --git a/pkg/kubelet/apis/config/v1beta1/defaults.go b/pkg/kubelet/apis/config/v1beta1/defaults.go
index 3b46d4164b3..c45764ae5e9 100644
--- a/pkg/kubelet/apis/config/v1beta1/defaults.go
+++ b/pkg/kubelet/apis/config/v1beta1/defaults.go
@@ -23,6 +23,7 @@ import (
 	kruntime "k8s.io/apimachinery/pkg/runtime"
 	componentbaseconfigv1alpha1 "k8s.io/component-base/config/v1alpha1"
 	kubeletconfigv1beta1 "k8s.io/kubelet/config/v1beta1"
+
 	// TODO: Cut references to k8s.io/kubernetes, eventually there should be none from this package
 	"k8s.io/kubernetes/pkg/cluster/ports"
 	"k8s.io/kubernetes/pkg/kubelet/qos"
@@ -154,6 +155,9 @@ func SetDefaults_KubeletConfiguration(obj *kubeletconfigv1beta1.KubeletConfigura
 		// Keep the same as default NodeStatusUpdateFrequency
 		obj.CPUManagerReconcilePeriod = metav1.Duration{Duration: 10 * time.Second}
 	}
+	if obj.MemoryManagerPolicy == "" {
+		obj.MemoryManagerPolicy = kubeletconfigv1beta1.NoneMemoryManagerPolicy
+	}
 	if obj.TopologyManagerPolicy == "" {
 		obj.TopologyManagerPolicy = kubeletconfigv1beta1.NoneTopologyManagerPolicy
 	}