diff --git a/src/runtime/internal/dev.ts b/src/runtime/internal/dev.ts
index 004ea3edaa..35a1c566a2 100644
--- a/src/runtime/internal/dev.ts
+++ b/src/runtime/internal/dev.ts
@@ -89,7 +89,7 @@ export function set_data_dev(text, data) {
 	text.data = data;
 }
 
-export function add_resize_observer_dev(node: HTMLElement, fn: () => void, opts?: ResizeObserverOptions) {
+export function add_resize_observer_dev(node: HTMLElement, fn: () => void, opts?: any) {
 	if ('ResizeObserver' in window) {
 		add_resize_observer(node, fn, opts);
 	} else {
diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index cc9fadc66d..ec0d186728 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -630,7 +630,7 @@ export function add_resize_listener(node: HTMLElement, fn: () => void) {
 	};
 }
 
-export function add_resize_observer(node: HTMLElement, fn: () => void, opts?: ResizeObserverOptions) {
+export function add_resize_observer(node: HTMLElement, fn: () => void, opts?: any) {
 	// @ts-ignore ResizeObserver is not available in current tsconfig lib
 	const observer = new ResizeObserver(entries => fn.call(entries.values().next().value));
 	observer.observe(node, opts);