diff --git a/core/soong_config.mk b/core/soong_config.mk
index 6470d22..4328453 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -136,6 +136,8 @@
 $(call add_json_list, BoardPlatPublicSepolicyDirs,       $(BOARD_PLAT_PUBLIC_SEPOLICY_DIR))
 $(call add_json_list, BoardPlatPrivateSepolicyDirs,      $(BOARD_PLAT_PRIVATE_SEPOLICY_DIR))
 
+$(call add_json_bool, FlattenApex,                       $(filter true,$(TARGET_FLATTEN_APEX)))
+
 $(call add_json_map, VendorVars)
 $(foreach namespace,$(SOONG_CONFIG_NAMESPACES),\
   $(call add_json_map, $(namespace))\