diff --git a/src/platform/timesrc.ts b/src/platform/timesrc.ts
index dbf51fb..d5d957a 100644
--- a/src/platform/timesrc.ts
+++ b/src/platform/timesrc.ts
@@ -13,7 +13,7 @@ const TimeSourceContext = createContext<Accessor<Date>>();
 export const TimeSourceProvider = TimeSourceContext.Provider;
 
 export function createTimeSource() {
-  let id: number | undefined;
+  let id: ReturnType<typeof setTimeout> | undefined;
   const [get, set] = createSignal(new Date());
 
   createRenderEffect(() =>