diff --git a/CleanSpec.mk b/CleanSpec.mk
index 07b3ece..020de69 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -302,6 +302,9 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
 
+# Move to libc++ as the default STL.
+$(call add-clean-step, rm -rf $(OUT_DIR))
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************