diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index f69a52b..619bd51 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -80,6 +80,21 @@
   protected $dependencies = array();
 
   /**
+   * The maximum length of a configuration object ID.
+   *
+   * Many filesystems (including HFS, NTFS, and ext4) have a maximum file name
+   * length of 255 characters. To ensure that no configuration objects
+   * incompatible with this limitation are created, we enforce a maximum name
+   * length of 250 characters (leaving 5 characters for the file extension).
+   *
+   * @see http://en.wikipedia.org/wiki/Comparison_of_file_systems
+   *
+   * 50 characters of the 250 is reserved for the module name,
+   * 32 characters for the config prefix, that leaves 166 characters for the ID length.
+   */
+  const MAX_ID_LENGTH = 166;
+
+  /**
    * The language code of the entity's default language.
    *
    * @var string
@@ -259,6 +274,13 @@ public function toArray() {
   public function preSave(EntityStorageControllerInterface $storage_controller) {
     parent::preSave($storage_controller);
 
+    if (strlen($this->id()) > self::MAX_ID_LENGTH) {
+      throw new \Drupal\Core\Config\ConfigNameException(String::format('Config entity machine name (id) @name exceeds maximum allowed length of @length characters.', array(
+        '@name' => $this->id(),
+        '@length' => self::MAX_ID_LENGTH,
+      )));
+    }
+
     // @todo When \Drupal\Core\Config\Entity\EntityWithPluginBagInterface moves
     //   to a trait, switch to class_uses() instead.
     if ($this instanceof EntityWithPluginBagInterface) {