From e4bca0ad31c01141a133f2071da35d2c994306e6 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Mon, 23 Jun 2025 14:08:42 +0200
Subject: [PATCH] fixes

---
 homeassistant/components/esphome/manager.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/homeassistant/components/esphome/manager.py b/homeassistant/components/esphome/manager.py
index 5f57e402d49..78f970d60a9 100644
--- a/homeassistant/components/esphome/manager.py
+++ b/homeassistant/components/esphome/manager.py
@@ -754,7 +754,9 @@ def _async_setup_device_registry(
 
     device_registry = dr.async_get(hass)
     # Build sets of valid device identifiers and connections
-    valid_connections = {(dr.CONNECTION_NETWORK_MAC, device_info.mac_address)}
+    valid_connections = {
+        (dr.CONNECTION_NETWORK_MAC, format_mac(device_info.mac_address))
+    }
     valid_identifiers = {
         (DOMAIN, f"{device_info.mac_address}_{sub_device.device_id}")
         for sub_device in device_info.devices