diff --git a/homeassistant/components/synology_dsm/__init__.py b/homeassistant/components/synology_dsm/__init__.py
index c4d0d822d19..46e502cd155 100644
--- a/homeassistant/components/synology_dsm/__init__.py
+++ b/homeassistant/components/synology_dsm/__init__.py
@@ -90,7 +90,10 @@ CONFIG_SCHEMA = vol.Schema(
 )
 
 CONFIG_SCHEMA = vol.Schema(
-    {DOMAIN: vol.Schema(vol.All(cv.ensure_list, [CONFIG_SCHEMA]))},
+    vol.All(
+        cv.deprecated(DOMAIN),
+        {DOMAIN: vol.Schema(vol.All(cv.ensure_list, [CONFIG_SCHEMA]))},
+    ),
     extra=vol.ALLOW_EXTRA,
 )