diff --git a/esphome/mqtt.py b/esphome/mqtt.py
index d24418cc8a..0d50edbc2c 100644
--- a/esphome/mqtt.py
+++ b/esphome/mqtt.py
@@ -159,7 +159,7 @@ def get_esphome_device_ip(
     username: str | None = None,
     password: str | None = None,
     client_id: str | None = None,
-    timeout=25,
+    timeout: int | float = 25,
 ) -> list[str]:
     if CONF_MQTT not in config:
         raise EsphomeError(