diff --git a/Android.mk b/Android.mk
index 2031db3..e5afdfb 100644
--- a/Android.mk
+++ b/Android.mk
@@ -11,6 +11,7 @@
 LOCAL_JACK_COVERAGE_INCLUDE_FILTER := com.android.providers.blockednumber.*
 
 LOCAL_PACKAGE_NAME := BlockedNumberProvider
+LOCAL_PRIVATE_PLATFORM_APIS := true
 LOCAL_CERTIFICATE := shared
 LOCAL_PRIVILEGED_MODULE := true
 
diff --git a/tests/Android.mk b/tests/Android.mk
index 203ac40..379f7b8 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -14,6 +14,7 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
 LOCAL_PACKAGE_NAME := BlockedNumberProviderTest
+LOCAL_PRIVATE_PLATFORM_APIS := true
 LOCAL_COMPATIBILITY_SUITE := device-tests
 
 LOCAL_INSTRUMENTATION_FOR := BlockedNumberProvider