diff --git a/src/components/popup/popup.ts b/src/components/popup/popup.ts
index 205a501fc5..438ba7ba18 100644
--- a/src/components/popup/popup.ts
+++ b/src/components/popup/popup.ts
@@ -7,6 +7,14 @@ import ShoelaceElement from '../../internal/shoelace-element.js';
 import styles from './popup.styles.js';
 import type { CSSResultGroup } from 'lit';
 
+export interface VirtualElement {
+  getBoundingClientRect: () => DOMRect;
+}
+
+function isVirtualElement(e: unknown): e is VirtualElement {
+  return e !== null && typeof e === 'object' && 'getBoundingClientRect' in e;
+}
+
 /**
  * @summary Popup is a utility that lets you declaratively anchor "popup" containers to another element.
  * @documentation https://shoelace.style/components/popup
@@ -35,15 +43,6 @@ import type { CSSResultGroup } from 'lit';
  *  popup can be before overflowing. Useful for positioning child elements that need to overflow. This property is only
  *  available when using `auto-size`.
  */
-
-export interface VirtualElement {
-  getBoundingClientRect: () => DOMRect;
-}
-
-function isVirtualElement(e: unknown): e is VirtualElement {
-  return e !== null && typeof e === 'object' && 'getBoundingClientRect' in e;
-}
-
 @customElement('sl-popup')
 export default class SlPopup extends ShoelaceElement {
   static styles: CSSResultGroup = styles;