diff --git a/pkg/registry/persistentvolume/strategy.go b/pkg/registry/persistentvolume/strategy.go
index 12eb72ce955..b8920c4708f 100644
--- a/pkg/registry/persistentvolume/strategy.go
+++ b/pkg/registry/persistentvolume/strategy.go
@@ -64,7 +64,7 @@ func (persistentvolumeStrategy) AllowCreateOnUpdate() bool {
 // PrepareForUpdate sets the Status fields which is not allowed to be set by an end user updating a PV
 func (persistentvolumeStrategy) PrepareForUpdate(obj, old runtime.Object) {
 	newPv := obj.(*api.PersistentVolume)
-	oldPv := obj.(*api.PersistentVolume)
+	oldPv := old.(*api.PersistentVolume)
 	newPv.Status = oldPv.Status
 }
 
@@ -86,7 +86,7 @@ var StatusStrategy = persistentvolumeStatusStrategy{Strategy}
 // PrepareForUpdate sets the Spec field which is not allowed to be changed when updating a PV's Status
 func (persistentvolumeStatusStrategy) PrepareForUpdate(obj, old runtime.Object) {
 	newPv := obj.(*api.PersistentVolume)
-	oldPv := obj.(*api.PersistentVolume)
+	oldPv := old.(*api.PersistentVolume)
 	newPv.Spec = oldPv.Spec
 }
 
diff --git a/pkg/registry/persistentvolumeclaim/strategy.go b/pkg/registry/persistentvolumeclaim/strategy.go
index 8580c53b112..100ad6a4cbd 100644
--- a/pkg/registry/persistentvolumeclaim/strategy.go
+++ b/pkg/registry/persistentvolumeclaim/strategy.go
@@ -64,7 +64,7 @@ func (persistentvolumeclaimStrategy) AllowCreateOnUpdate() bool {
 // PrepareForUpdate sets the Status field which is not allowed to be set by end users on update
 func (persistentvolumeclaimStrategy) PrepareForUpdate(obj, old runtime.Object) {
 	newPvc := obj.(*api.PersistentVolumeClaim)
-	oldPvc := obj.(*api.PersistentVolumeClaim)
+	oldPvc := old.(*api.PersistentVolumeClaim)
 	newPvc.Status = oldPvc.Status
 }
 
@@ -86,7 +86,7 @@ var StatusStrategy = persistentvolumeclaimStatusStrategy{Strategy}
 // PrepareForUpdate sets the Spec field which is not allowed to be changed when updating a PV's Status
 func (persistentvolumeclaimStatusStrategy) PrepareForUpdate(obj, old runtime.Object) {
 	newPv := obj.(*api.PersistentVolumeClaim)
-	oldPv := obj.(*api.PersistentVolumeClaim)
+	oldPv := old.(*api.PersistentVolumeClaim)
 	newPv.Spec = oldPv.Spec
 }