diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index 91e575ebf6..afc51db283 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -122,7 +122,7 @@ export function set_custom_element_data(node, prop, value) {
 	}
 }
 
-export function xlink_attr(node, attribute, value) {
+export function xlink_attr(node: Element, attribute: string, value: string) {
 	node.setAttributeNS('http://www.w3.org/1999/xlink', attribute, value);
 }
 
diff --git a/src/runtime/internal/utils.ts b/src/runtime/internal/utils.ts
index 3b8815cb1d..db5b9c3f3f 100644
--- a/src/runtime/internal/utils.ts
+++ b/src/runtime/internal/utils.ts
@@ -2,7 +2,7 @@ import { Readable } from 'svelte/store';
 
 export function noop() {}
 
-export const identity = x => x;
+export const identity = <T>(x:T) => x;
 
 export function assign<T, S>(tar: T, src: S): T & S {
 	// @ts-ignore