diff --git a/keymaster/4.0/default/service.cpp b/keymaster/4.0/default/service.cpp
new file mode 100644
index 0000000..adb27e1
--- /dev/null
+++ b/keymaster/4.0/default/service.cpp
@@ -0,0 +1,33 @@
+/*
+**
+** Copyright 2017, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#include <android-base/logging.h>
+#include <android/hardware/keymaster/4.0/IKeymaster.h>
+#include <hidl/HidlTransportSupport.h>
+
+#include <AndroidKeymaster4.h>
+
+int main() {
+    auto keymaster = ::keymaster::V4_0::ng::CreateKeymaster();
+    auto status = keymaster->registerAsService();
+    if (status != android::OK) {
+        LOG(FATAL) << "Could not register service for Keymaster 4.0 (" << status << ")";
+    }
+
+    android::hardware::joinRpcThreadpool();
+    return -1;  // Should never get here.
+}