diff --git a/Android.mk b/Android.mk
index 18362b8..40bb7f9 100644
--- a/Android.mk
+++ b/Android.mk
@@ -6,6 +6,7 @@
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_PACKAGE_NAME := OpenWnn
+LOCAL_PRIVATE_PLATFORM_APIS := true
 
 LOCAL_JNI_SHARED_LIBRARIES := \
 	 libWnnEngDic libWnnJpnDic libwnndict