diff --git a/src/lib/updating-element.ts b/src/lib/updating-element.ts
index a84cc54c..2f642e64 100644
--- a/src/lib/updating-element.ts
+++ b/src/lib/updating-element.ts
@@ -396,6 +396,13 @@ export abstract class UpdatingElement extends HTMLElement {
     }
   }
 
+  /**
+   * Allows for `super.disconnectedCallback()` in extensions while
+   * reserving the possibility of making non-breaking feature additions
+   * when disconnecting at some point in the future.
+   */
+  disconnectedCallback() {}
+
   /**
    * Synchronizes property values when attributes change.
    */
@@ -610,4 +617,4 @@ export abstract class UpdatingElement extends HTMLElement {
    * * @param _changedProperties Map of changed properties with old values
    */
   protected firstUpdated(_changedProperties: PropertyValues) {}
-}
\ No newline at end of file
+}