diff --git a/.changeset/big-vans-destroy.md b/.changeset/big-vans-destroy.md
new file mode 100644
index 000000000000..7cd0ebaac12a
--- /dev/null
+++ b/.changeset/big-vans-destroy.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: asynchronously instantiate components when using Svelte 5
diff --git a/packages/kit/src/runtime/client/client.js b/packages/kit/src/runtime/client/client.js
index f91728bccc2c..f828720b88c0 100644
--- a/packages/kit/src/runtime/client/client.js
+++ b/packages/kit/src/runtime/client/client.js
@@ -434,7 +434,9 @@ function initialize(result, target, hydrate) {
 	root = new app.root({
 		target,
 		props: { ...result.props, stores, components },
-		hydrate
+		hydrate,
+		// @ts-ignore Svelte 5 specific: asynchronously instantiate the component, i.e. don't call flushSync
+		sync: false
 	});
 
 	restore_snapshot(current_navigation_index);