diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index 42ad63e..ec68ced 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -263,4 +263,27 @@ public function url($rel = 'edit-form', $options = array()) {
     return parent::url($rel, $options);
   }
 
+  /**
+   * Implements the magic __sleep() method.
+   *
+   * Using the Serialize interface and serialize() / unserialize() methods
+   * breaks entity forms in PHP 5.4.
+   * @todo Investigate in https://drupal.org/node/2074253.
+   */
+  public function __sleep() {
+    // Only serialize properties from getExportProperties().
+    $keys = array_keys($this->getExportProperties());
+    $keys[] = 'entityTypeId';
+    return $keys;
+  }
+
+  /**
+   * Implements the magic __wakeup() method.
+   */
+  public function __wakeup() {
+    // Run the values from getExportProperties() through __construct().
+    $values = array_intersect_key($this->getExportProperties(), get_object_vars($this));
+    $this->__construct($values, $this->entityTypeId);
+  }
+
 }
diff --git a/core/modules/entity/lib/Drupal/entity/Entity/EntityFormDisplay.php b/core/modules/entity/lib/Drupal/entity/Entity/EntityFormDisplay.php
index 611e28f..8afd2b7 100644
--- a/core/modules/entity/lib/Drupal/entity/Entity/EntityFormDisplay.php
+++ b/core/modules/entity/lib/Drupal/entity/Entity/EntityFormDisplay.php
@@ -145,23 +145,4 @@ public function getRenderer($field_name) {
     return $widget;
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function __sleep() {
-    // Only store the definition, not external objects or derived data.
-    $keys = array_keys($this->getExportProperties());
-    $keys[] = 'entityTypeId';
-    return $keys;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function __wakeup() {
-    // Run the values from getExportProperties() through __construct().
-    $values = array_intersect_key($this->getExportProperties(), get_object_vars($this));
-    $this->__construct($values, $this->entityTypeId);
-  }
-
 }
diff --git a/core/modules/field/lib/Drupal/field/Entity/FieldConfig.php b/core/modules/field/lib/Drupal/field/Entity/FieldConfig.php
index da997b6..ec8266a 100644
--- a/core/modules/field/lib/Drupal/field/Entity/FieldConfig.php
+++ b/core/modules/field/lib/Drupal/field/Entity/FieldConfig.php
@@ -690,27 +690,6 @@ public function hasData() {
   }
 
   /**
-   * Implements the magic __sleep() method.
-   *
-   * Using the Serialize interface and serialize() / unserialize() methods
-   * breaks entity forms in PHP 5.4.
-   * @todo Investigate in https://drupal.org/node/2074253.
-   */
-  public function __sleep() {
-    // Only serialize properties from getExportProperties().
-    return array_keys(array_intersect_key($this->getExportProperties(), get_object_vars($this)));
-  }
-
-  /**
-   * Implements the magic __wakeup() method.
-   */
-  public function __wakeup() {
-    // Run the values from getExportProperties() through __construct().
-    $values = array_intersect_key($this->getExportProperties(), get_object_vars($this));
-    $this->__construct($values);
-  }
-
-  /**
    * {@inheritdoc}
    */
   public static function createFromDataType($type) {
diff --git a/core/modules/field/lib/Drupal/field/Entity/FieldInstanceConfig.php b/core/modules/field/lib/Drupal/field/Entity/FieldInstanceConfig.php
index 3c35bfb..d770ebf 100644
--- a/core/modules/field/lib/Drupal/field/Entity/FieldInstanceConfig.php
+++ b/core/modules/field/lib/Drupal/field/Entity/FieldInstanceConfig.php
@@ -612,27 +612,6 @@ public function targetBundle() {
     return $this->bundle;
   }
 
-  /*
-   * Implements the magic __sleep() method.
-   *
-   * Using the Serialize interface and serialize() / unserialize() methods
-   * breaks entity forms in PHP 5.4.
-   * @todo Investigate in https://drupal.org/node/2074253.
-   */
-  public function __sleep() {
-    // Only serialize properties from getExportProperties().
-    return array_keys(array_intersect_key($this->getExportProperties(), get_object_vars($this)));
-  }
-
-  /**
-   * Implements the magic __wakeup() method.
-   */
-  public function __wakeup() {
-    // Run the values from getExportProperties() through __construct().
-    $values = array_intersect_key($this->getExportProperties(), get_object_vars($this));
-    $this->__construct($values);
-  }
-
   /**
    * {@inheritdoc}
    */