diff --git a/CleanSpec.mk b/CleanSpec.mk
index 11846f6ed8..c55763568f 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -53,3 +53,4 @@ $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/hw/android.hardware.blue
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib64/hw/android.hardware.bluetooth*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/init/android.hardware.bluetooth*)
 $(call add-clean-step, rm -rf $(OUT)/soong/.intermediates/)
+$(call add-clean-step, rm -rf $(OUT_DIR)/soong/.intermediates/hardware/interfaces/)