diff --git a/core/android_soong_config_vars.mk b/core/android_soong_config_vars.mk
index fccc2a5..e5a8e44 100644
--- a/core/android_soong_config_vars.mk
+++ b/core/android_soong_config_vars.mk
@@ -40,6 +40,8 @@
 $(call add_soong_config_var,ANDROID,TARGET_ENABLE_MEDIADRM_64)
 $(call add_soong_config_var,ANDROID,TARGET_DYNAMIC_64_32_MEDIASERVER)
 
+$(call add_soong_config_var,ANDROID,ADDITIONAL_M4DEFS,$(if $(BOARD_SEPOLICY_M4DEFS),$(addprefix -D,$(BOARD_SEPOLICY_M4DEFS))))
+
 # For Sanitizers
 $(call soong_config_set_bool,ANDROID,ASAN_ENABLED,$(if $(filter address,$(SANITIZE_TARGET)),true,false))
 $(call soong_config_set_bool,ANDROID,HWASAN_ENABLED,$(if $(filter hwaddress,$(SANITIZE_TARGET)),true,false))