diff --git a/src/runtime/store/index.ts b/src/runtime/store/index.ts
index d5b0cf3583..e947fa0740 100644
--- a/src/runtime/store/index.ts
+++ b/src/runtime/store/index.ts
@@ -97,9 +97,7 @@ export function writable<T>(value?: T, start: StartStopNotifier<T> = noop): Writ
 		run(value);
 
 		return () => {
-			if (subscribers.has(subscriber)) {
-				subscribers.delete(subscriber);
-			}
+			subscribers.delete(subscriber);
 			if (subscribers.size === 0) {
 				stop();
 				stop = null;