diff --git a/supervisor/dbus/network/__init__.py b/supervisor/dbus/network/__init__.py
index cf6310858..cd6b652c4 100644
--- a/supervisor/dbus/network/__init__.py
+++ b/supervisor/dbus/network/__init__.py
@@ -215,6 +215,8 @@ class NetworkManager(DBusInterfaceProxy):
                 == self.properties[DBUS_ATTR_PRIMARY_CONNECTION]
             ):
                 interface.primary = True
+            else:
+                interface.primary = False
 
             interfaces[interface.name] = interface