diff --git a/homeassistant/components/asterisk_cdr/mailbox.py b/homeassistant/components/asterisk_cdr/mailbox.py
index a826ca8e7ce..a6c246831af 100644
--- a/homeassistant/components/asterisk_cdr/mailbox.py
+++ b/homeassistant/components/asterisk_cdr/mailbox.py
@@ -20,7 +20,7 @@ async def async_get_handler(
     hass: HomeAssistant,
     config: ConfigType,
     discovery_info: DiscoveryInfoType | None = None,
-) -> Mailbox | None:
+) -> Mailbox:
     """Set up the Asterix CDR platform."""
     return AsteriskCDR(hass, MAILBOX_NAME)
 
diff --git a/homeassistant/components/asterisk_mbox/mailbox.py b/homeassistant/components/asterisk_mbox/mailbox.py
index 7632203df4e..04d2be70704 100644
--- a/homeassistant/components/asterisk_mbox/mailbox.py
+++ b/homeassistant/components/asterisk_mbox/mailbox.py
@@ -23,7 +23,7 @@ async def async_get_handler(
     hass: HomeAssistant,
     config: ConfigType,
     discovery_info: DiscoveryInfoType | None = None,
-) -> Mailbox | None:
+) -> Mailbox:
     """Set up the Asterix VM platform."""
     return AsteriskMailbox(hass, ASTERISK_DOMAIN)