diff --git a/core/soong_config.mk b/core/soong_config.mk
index fd60b71..a48b4d8 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -271,6 +271,8 @@
 $(call add_json_list, SepolicyFreezeTestExtraDirs,         $(SEPOLICY_FREEZE_TEST_EXTRA_DIRS))
 $(call add_json_list, SepolicyFreezeTestExtraPrebuiltDirs, $(SEPOLICY_FREEZE_TEST_EXTRA_PREBUILT_DIRS))
 
+$(call add_json_bool, GenerateAidlNdkPlatformBackend, $(filter true,$(NEED_AIDL_NDK_PLATFORM_BACKEND)))
+
 $(call json_end)
 
 $(file >$(SOONG_VARIABLES).tmp,$(json_contents))