diff --git a/api/swagger-spec/v1.json b/api/swagger-spec/v1.json
index 75b7819e695..2a74f5eda0c 100644
--- a/api/swagger-spec/v1.json
+++ b/api/swagger-spec/v1.json
@@ -11879,6 +11879,9 @@
    "v1.PersistentVolumeClaimList": {
     "id": "v1.PersistentVolumeClaimList",
     "description": "PersistentVolumeClaimList is a list of PersistentVolumeClaim items.",
+    "required": [
+     "items"
+    ],
     "properties": {
      "kind": {
       "type": "string",
@@ -11990,6 +11993,9 @@
    "v1.PersistentVolumeList": {
     "id": "v1.PersistentVolumeList",
     "description": "PersistentVolumeList is a list of PersistentVolume items.",
+    "required": [
+     "items"
+    ],
     "properties": {
      "kind": {
       "type": "string",
diff --git a/pkg/api/types.go b/pkg/api/types.go
index bd05acb150c..cd36da099c3 100644
--- a/pkg/api/types.go
+++ b/pkg/api/types.go
@@ -326,7 +326,7 @@ type PersistentVolumeStatus struct {
 type PersistentVolumeList struct {
 	TypeMeta `json:",inline"`
 	ListMeta `json:"metadata,omitempty"`
-	Items    []PersistentVolume `json:"items,omitempty"`
+	Items    []PersistentVolume `json:"items"`
 }
 
 // PersistentVolumeClaim is a user's request for and claim to a persistent volume
@@ -344,7 +344,7 @@ type PersistentVolumeClaim struct {
 type PersistentVolumeClaimList struct {
 	TypeMeta `json:",inline"`
 	ListMeta `json:"metadata,omitempty"`
-	Items    []PersistentVolumeClaim `json:"items,omitempty"`
+	Items    []PersistentVolumeClaim `json:"items"`
 }
 
 // PersistentVolumeClaimSpec describes the common attributes of storage devices
diff --git a/pkg/api/v1/types.go b/pkg/api/v1/types.go
index a09760c1b43..d70760b9e2a 100644
--- a/pkg/api/v1/types.go
+++ b/pkg/api/v1/types.go
@@ -419,7 +419,7 @@ type PersistentVolumeList struct {
 	ListMeta `json:"metadata,omitempty"`
 	// List of persistent volumes.
 	// More info: http://releases.k8s.io/HEAD/docs/user-guide/persistent-volumes.md
-	Items []PersistentVolume `json:"items,omitempty"`
+	Items []PersistentVolume `json:"items"`
 }
 
 // PersistentVolumeClaim is a user's request for and claim to a persistent volume
@@ -447,7 +447,7 @@ type PersistentVolumeClaimList struct {
 	ListMeta `json:"metadata,omitempty"`
 	// A list of persistent volume claims.
 	// More info: http://releases.k8s.io/HEAD/docs/user-guide/persistent-volumes.md#persistentvolumeclaims
-	Items []PersistentVolumeClaim `json:"items,omitempty"`
+	Items []PersistentVolumeClaim `json:"items"`
 }
 
 // PersistentVolumeClaimSpec describes the common attributes of storage devices