diff --git a/Android.mk b/Android.mk
index 64b8797..2366174 100644
--- a/Android.mk
+++ b/Android.mk
@@ -27,6 +27,7 @@
         src/com/android/providers/calendar/EventLogTags.logtags
 
 LOCAL_PACKAGE_NAME := CalendarProvider
+LOCAL_PRIVATE_PLATFORM_APIS := true
 
 LOCAL_PRIVILEGED_MODULE := true
 
diff --git a/tests/Android.mk b/tests/Android.mk
index 86cac8a..07cf42c 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -8,6 +8,7 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
 LOCAL_PACKAGE_NAME := CalendarProviderTests
+LOCAL_PRIVATE_PLATFORM_APIS := true
 LOCAL_COMPATIBILITY_SUITE := device-tests
 
 LOCAL_STATIC_JAVA_LIBRARIES := calendar-common junit legacy-android-test