diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 305e1240db..847d928f2e 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -2157,12 +2157,15 @@ declare module 'svelte/reactivity' {
 		get searchParams(): SvelteURLSearchParams;
 		#private;
 	}
+	const REPLACE: unique symbol;
+	const onChange: unique symbol;
 	export class SvelteURLSearchParams extends URLSearchParams {
 		
+		[onChange]: ((command: "set" | "append" | "delete" | "sort", ...args: any[]) => void) | null;
+		
 		[REPLACE](params: URLSearchParams): void;
 		#private;
 	}
-	const REPLACE: unique symbol;
 
 	export { Date_1 as Date, Set_1 as Set, Map_1 as Map, URL_1 as URL, URLSearchParams_1 as URLSearchParams };
 }