diff --git a/homeassistant/components/mikrotik/__init__.py b/homeassistant/components/mikrotik/__init__.py
index cd96cba327c..b3813dc6a6e 100644
--- a/homeassistant/components/mikrotik/__init__.py
+++ b/homeassistant/components/mikrotik/__init__.py
@@ -45,7 +45,10 @@ MIKROTIK_SCHEMA = vol.All(
 
 
 CONFIG_SCHEMA = vol.Schema(
-    {DOMAIN: vol.All(cv.ensure_list, [MIKROTIK_SCHEMA])}, extra=vol.ALLOW_EXTRA
+    vol.All(
+        cv.deprecated(DOMAIN), {DOMAIN: vol.All(cv.ensure_list, [MIKROTIK_SCHEMA])}
+    ),
+    extra=vol.ALLOW_EXTRA,
 )