diff --git a/soundtrigger/2.1/default/Android.mk b/soundtrigger/2.1/default/Android.mk
new file mode 100644
index 0000000..5851d63
--- /dev/null
+++ b/soundtrigger/2.1/default/Android.mk
@@ -0,0 +1,49 @@
+#
+# 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.
+
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.soundtrigger@2.1-impl
+LOCAL_VENDOR_MODULE := true
+LOCAL_MODULE_RELATIVE_PATH := hw
+LOCAL_SRC_FILES := \
+    SoundTriggerHw.cpp
+
+LOCAL_CFLAGS := -Wall -Werror
+
+LOCAL_SHARED_LIBRARIES := \
+        libhardware \
+        libhidlbase \
+        libhidlmemory \
+        libhidltransport \
+        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
+
+LOCAL_C_INCLUDE_DIRS := $(LOCAL_PATH)
+
+ifeq ($(strip $(AUDIOSERVER_MULTILIB)),)
+LOCAL_MULTILIB := 32
+else
+LOCAL_MULTILIB := $(AUDIOSERVER_MULTILIB)
+endif
+
+include $(BUILD_SHARED_LIBRARY)