diff --git a/custom_components/mikrotik_router/mikrotik_controller.py b/custom_components/mikrotik_router/mikrotik_controller.py
index 3455f2f..a5e486e 100644
--- a/custom_components/mikrotik_router/mikrotik_controller.py
+++ b/custom_components/mikrotik_router/mikrotik_controller.py
@@ -1340,7 +1340,7 @@ class MikrotikControllerData:
             key="mac-address",
             vals=[
                 {"name": "mac-address"},
-                {"name": "active-mac-address"},
+                {"name": "active-mac-address", "default": "unknown"},
                 {"name": "address", "default": "unknown"},
                 {"name": "active-address", "default": "unknown"},
                 {"name": "host-name", "default": "unknown"},