diff --git a/homeassistant/components/pi_hole/__init__.py b/homeassistant/components/pi_hole/__init__.py
index 7e897887d8d..34fdc9978c1 100644
--- a/homeassistant/components/pi_hole/__init__.py
+++ b/homeassistant/components/pi_hole/__init__.py
@@ -52,7 +52,10 @@ PI_HOLE_SCHEMA = vol.Schema(
 )
 
 CONFIG_SCHEMA = vol.Schema(
-    {DOMAIN: vol.Schema(vol.All(cv.ensure_list, [PI_HOLE_SCHEMA]))},
+    vol.All(
+        cv.deprecated(DOMAIN),
+        {DOMAIN: vol.Schema(vol.All(cv.ensure_list, [PI_HOLE_SCHEMA]))},
+    ),
     extra=vol.ALLOW_EXTRA,
 )