diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index f1b2a2bb14..e199a0d8ee 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -641,7 +641,6 @@ export function add_iframe_resize_listener(node: HTMLElement, fn: () => void) {
 	};
 }
 
-export const resize_observer_content_rect = new ResizeObserverSingleton({ box: 'content-box' });
 export const resize_observer_content_box = new ResizeObserverSingleton({ box: 'content-box' });
 export const resize_observer_border_box = new ResizeObserverSingleton({ box: 'border-box' });
 export const resize_observer_device_pixel_content_box = new ResizeObserverSingleton({ box: 'device-pixel-content-box' });