diff --git a/buffet/commands/dbus_command_proxy_unittest.cc b/buffet/commands/dbus_command_proxy_unittest.cc
index e0cad8f..c2ca7d8 100644
--- a/buffet/commands/dbus_command_proxy_unittest.cc
+++ b/buffet/commands/dbus_command_proxy_unittest.cc
@@ -93,7 +93,7 @@
       }
     })");
     command_instance_ =
-        CommandInstance::FromJson(json.get(), "local", dict_, nullptr);
+        CommandInstance::FromJson(json.get(), "local", dict_, nullptr, nullptr);
     command_instance_->SetID(kTestCommandId);
 
     // Set up a mock ExportedObject to be used with the DBus command proxy.