diff --git a/src/onboarding/ha-onboarding.ts b/src/onboarding/ha-onboarding.ts
index 915ed733256d..cc73fcffb9d6 100644
--- a/src/onboarding/ha-onboarding.ts
+++ b/src/onboarding/ha-onboarding.ts
@@ -59,7 +59,7 @@ declare global {
 class HaOnboarding extends litLocalizeLiteMixin(HassElement) {
   @property({ attribute: false }) public hass?: HomeAssistant;
 
-  public translationFragment = "page-onboarding";
+  @property() public translationFragment = "page-onboarding";
 
   @state() private _loading = false;