diff --git a/.changeset/lemon-mails-guess.md b/.changeset/lemon-mails-guess.md
new file mode 100644
index 0000000000..9156bac953
--- /dev/null
+++ b/.changeset/lemon-mails-guess.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: take async into consideration for dev delegated handlers
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/events.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/events.js
index 9485a33b3d..f01bf08694 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/events.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/events.js
@@ -70,7 +70,8 @@ export function build_event(context, event_name, handler, capture, passive, dele
 		fn = b.function(
 			b.id(name),
 			handler.params,
-			handler.body.type === 'BlockStatement' ? handler.body : b.block([b.return(handler.body)])
+			handler.body.type === 'BlockStatement' ? handler.body : b.block([b.return(handler.body)]),
+			handler.async
 		);
 	}
 
diff --git a/packages/svelte/tests/runtime-runes/samples/event-handler-async-delegated/_config.js b/packages/svelte/tests/runtime-runes/samples/event-handler-async-delegated/_config.js
new file mode 100644
index 0000000000..eb5b2a1675
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/event-handler-async-delegated/_config.js
@@ -0,0 +1,9 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	compileOptions: {
+		dev: true
+	},
+	async test() {}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/event-handler-async-delegated/main.svelte b/packages/svelte/tests/runtime-runes/samples/event-handler-async-delegated/main.svelte
new file mode 100644
index 0000000000..bffcad6059
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/event-handler-async-delegated/main.svelte
@@ -0,0 +1,8 @@
+<button
+	type="button"
+	onclick={async () => {
+		await Promise.resolve();
+	}}
+>
+	Button
+</button>