diff --git a/.changeset/lovely-feet-greet.md b/.changeset/lovely-feet-greet.md
new file mode 100644
index 0000000000..9ba35a1552
--- /dev/null
+++ b/.changeset/lovely-feet-greet.md
@@ -0,0 +1,5 @@
+---
+"astro": patch
+---
+
+Fixes `app.toggleState` not working correctly
diff --git a/packages/astro/src/runtime/client/dev-toolbar/helpers.ts b/packages/astro/src/runtime/client/dev-toolbar/helpers.ts
index 849c8cb101..c205d0003d 100644
--- a/packages/astro/src/runtime/client/dev-toolbar/helpers.ts
+++ b/packages/astro/src/runtime/client/dev-toolbar/helpers.ts
@@ -46,7 +46,7 @@ export class ToolbarAppEventTarget extends EventTarget {
 	 */
 	toggleState(options: AppStatePayload) {
 		this.dispatchEvent(
-			new CustomEvent('app-toggled', {
+			new CustomEvent('toggle-app', {
 				detail: {
 					state: options.state,
 				} satisfies AppStatePayload,