diff --git a/hotp/Android.mk b/hotp/Android.mk
new file mode 100644
index 0000000..b3b680e
--- /dev/null
+++ b/hotp/Android.mk
@@ -0,0 +1,20 @@
+###################### HOTP ######################
+LOCAL_PATH := $(call my-dir)
+
+OPTEE_CLIENT_EXPORT = $(LOCAL_PATH)/../../optee_client/out/export
+
+include $(CLEAR_VARS)
+LOCAL_CFLAGS += -DANDROID_BUILD
+LOCAL_CFLAGS += -Wall
+
+LOCAL_SRC_FILES += host/main.c
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/ta/include \
+		    $(OPTEE_CLIENT_EXPORT)/include
+
+LOCAL_SHARED_LIBRARIES := libteec
+LOCAL_MODULE := hotp
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_EXECUTABLE)
+
+include $(LOCAL_PATH)/ta/Android.mk
diff --git a/hotp/ta/Android.mk b/hotp/ta/Android.mk
new file mode 100644
index 0000000..036c131
--- /dev/null
+++ b/hotp/ta/Android.mk
@@ -0,0 +1,4 @@
+LOCAL_PATH := $(call my-dir)
+
+local_module := 484d4143-2d53-4841-3120-4a6f636b6542.ta
+include $(BUILD_OPTEE_MK)