diff --git a/core/modules/field/src/Entity/FieldConfig.php b/core/modules/field/src/Entity/FieldConfig.php
index dc5607a..a83c923 100644
--- a/core/modules/field/src/Entity/FieldConfig.php
+++ b/core/modules/field/src/Entity/FieldConfig.php
@@ -46,7 +46,7 @@ class FieldConfig extends FieldConfigBase implements FieldConfigInterface {
    *
    * @var bool
    */
-  public $deleted = FALSE;
+  protected $deleted = FALSE;
 
   /**
    * The associated FieldStorageConfig entity.
diff --git a/core/modules/field/src/FieldConfigStorage.php b/core/modules/field/src/FieldConfigStorage.php
index 89ea181..b6f68db 100644
--- a/core/modules/field/src/FieldConfigStorage.php
+++ b/core/modules/field/src/FieldConfigStorage.php
@@ -158,6 +158,10 @@ public function loadByProperties(array $conditions = array()) {
             $checked_value = $field->uuid();
             break;
 
+          case 'deleted';
+            $checked_value = $field->isDeleted();
+            break;
+
           default:
             $checked_value = $field->$key;
             break;
diff --git a/core/modules/field/src/Tests/BulkDeleteTest.php b/core/modules/field/src/Tests/BulkDeleteTest.php
index 4ae227b..831b3c8 100644
--- a/core/modules/field/src/Tests/BulkDeleteTest.php
+++ b/core/modules/field/src/Tests/BulkDeleteTest.php
@@ -304,7 +304,7 @@ function testPurgeFieldStorage() {
 
     // The field still exists, deleted.
     $fields = entity_load_multiple_by_properties('field_config', array('uuid' => $field->uuid(), 'include_deleted' => TRUE));
-    $this->assertTrue(isset($fields[$field->uuid()]) && $fields[$field->uuid()]->deleted, 'The field exists and is deleted');
+    $this->assertTrue(isset($fields[$field->uuid()]) && $fields[$field->uuid()]->isDeleted(), 'The field exists and is deleted');
 
     // Purge again to purge the field.
     field_purge_batch(0);
@@ -339,7 +339,7 @@ function testPurgeFieldStorage() {
 
     // The field and the storage still exist, deleted.
     $fields = entity_load_multiple_by_properties('field_config', array('uuid' => $field->uuid(), 'include_deleted' => TRUE));
-    $this->assertTrue(isset($fields[$field->uuid()]) && $fields[$field->uuid()]->deleted, 'The field exists and is deleted');
+    $this->assertTrue(isset($fields[$field->uuid()]) && $fields[$field->uuid()]->isDeleted(), 'The field exists and is deleted');
     $storages = entity_load_multiple_by_properties('field_storage_config', array('uuid' => $field_storage->uuid(), 'include_deleted' => TRUE));
     $this->assertTrue(isset($storages[$field_storage->uuid()]) && $storages[$field_storage->uuid()]->deleted, 'The field storage exists and is deleted');
 
diff --git a/core/modules/field/src/Tests/FieldCrudTest.php b/core/modules/field/src/Tests/FieldCrudTest.php
index 94639e1..f3001e1 100644
--- a/core/modules/field/src/Tests/FieldCrudTest.php
+++ b/core/modules/field/src/Tests/FieldCrudTest.php
@@ -183,7 +183,7 @@ function testDeleteField() {
 
     // Make sure the field is marked as deleted when it is specifically loaded.
     $field = current(entity_load_multiple_by_properties('field_config', array('entity_type' => 'entity_test', 'field_name' => $this->fieldDefinition['field_name'], 'bundle' => $this->fieldDefinition['bundle'], 'include_deleted' => TRUE)));
-    $this->assertTrue(!empty($field->deleted), 'A deleted field is marked for deletion.');
+    $this->assertTrue($field->isDeleted(), 'A deleted field is marked for deletion.');
 
     // Try to load the field normally and make sure it does not show up.
     $field = FieldConfig::load('entity_test.' . '.' . $this->fieldDefinition['bundle'] . '.' . $this->fieldDefinition['field_name']);
diff --git a/core/modules/field/src/Tests/FieldStorageCrudTest.php b/core/modules/field/src/Tests/FieldStorageCrudTest.php
index 735b3d2..14a3861 100644
--- a/core/modules/field/src/Tests/FieldStorageCrudTest.php
+++ b/core/modules/field/src/Tests/FieldStorageCrudTest.php
@@ -316,7 +316,7 @@ function testDelete() {
     // Make sure that this field is marked as deleted when it is
     // specifically loaded.
     $field = current(entity_load_multiple_by_properties('field_config', array('entity_type' => 'entity_test', 'field_name' => $field_definition['field_name'], 'bundle' => $field_definition['bundle'], 'include_deleted' => TRUE)));
-    $this->assertTrue(!empty($field->deleted), 'A field whose storage was deleted is marked for deletion.');
+    $this->assertTrue($field->isDeleted(), 'A field whose storage was deleted is marked for deletion.');
 
     // Try to load the storage normally and make sure it does not show up.
     $field_storage = FieldStorageConfig::load('entity_test.' . $field_storage_definition['field_name']);
@@ -330,7 +330,7 @@ function testDelete() {
     $another_field_storage = FieldStorageConfig::load('entity_test.' . $another_field_storage_definition['field_name']);
     $this->assertTrue(!empty($another_field_storage) && empty($another_field_storage->deleted), 'A non-deleted storage is not marked for deletion.');
     $another_field = FieldConfig::load('entity_test.' . $another_field_definition['bundle'] . '.' . $another_field_definition['field_name']);
-    $this->assertTrue(!empty($another_field) && empty($another_field->deleted), 'A field whose storage was not deleted is not marked for deletion.');
+    $this->assertTrue(!empty($another_field) && !$another_field->isDeleted(), 'A field whose storage was not deleted is not marked for deletion.');
 
     // Try to create a new field the same name as a deleted field and
     // write data into it.
@@ -339,7 +339,7 @@ function testDelete() {
     $field_storage = FieldStorageConfig::load('entity_test.' . $field_storage_definition['field_name']);
     $this->assertTrue(!empty($field_storage) && empty($field_storage->deleted), 'A new storage with a previously used name is created.');
     $field = FieldConfig::load('entity_test.' . $field_definition['bundle'] . '.' . $field_definition['field_name'] );
-    $this->assertTrue(!empty($field) && empty($field->deleted), 'A new field for a previously used field name is created.');
+    $this->assertTrue(!empty($field) && !$field->isDeleted(), 'A new field for a previously used field name is created.');
 
     // Save an entity with data for the field
     $entity = entity_create('entity_test');