diff --git a/soundtrigger/2.1/default/Android.bp b/soundtrigger/2.1/default/Android.bp
new file mode 100644
index 0000000..a246680
--- /dev/null
+++ b/soundtrigger/2.1/default/Android.bp
@@ -0,0 +1,57 @@
+//
+// Copyright (C) 2018 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.
+
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: [
+        "hardware_interfaces_license",
+    ],
+}
+
+soong_config_module_type_import {
+    from: "hardware/interfaces/soundtrigger/2.0/default/Android.bp",
+    module_types: ["soundtrigger_cc_library_shared"],
+}
+
+soundtrigger_cc_library_shared {
+    name: "android.hardware.soundtrigger@2.1-impl",
+    vendor: true,
+    relative_install_path: "hw",
+    srcs: ["SoundTriggerHw.cpp"],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+
+    shared_libs: [
+        "libhardware",
+        "libhidlbase",
+        "libhidlmemory",
+        "liblog",
+        "libutils",
+        "android.hardware.soundtrigger@2.1",
+        "android.hardware.soundtrigger@2.0",
+        "android.hardware.soundtrigger@2.0-core",
+        "android.hidl.allocator@1.0",
+        "android.hidl.memory@1.0",
+    ],
+    compile_multilib: "32",
+    soong_config_variables: {
+        audioserver_multilib: {
+            compile_multilib: "%s",
+        },
+    },
+}