diff --git a/homeassistant/components/hyperion/config_flow.py b/homeassistant/components/hyperion/config_flow.py
index 64a9831800f..161c531328d 100644
--- a/homeassistant/components/hyperion/config_flow.py
+++ b/homeassistant/components/hyperion/config_flow.py
@@ -111,6 +111,8 @@ class HyperionConfigFlow(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
+    unique_id: str
+
     def __init__(self) -> None:
         """Instantiate config flow."""
         self._data: dict[str, Any] = {}