diff --git a/Makefile b/Makefile
index 69b9799605298c..f316b21ec18b8b 100644
--- a/Makefile
+++ b/Makefile
@@ -108,7 +108,7 @@ cctest: all
 
 v8:
 	tools/make-v8.sh v8
-	$(MAKE) -C deps/v8 $(V8_ARCH) $(V8_BUILD_OPTIONS)
+	$(MAKE) -C deps/v8 $(V8_ARCH).$(BUILDTYPE_LOWER) $(V8_BUILD_OPTIONS)
 
 test: | cctest  # Depends on 'all'.
 	$(PYTHON) tools/test.py --mode=release doctool message pseudo-tty parallel sequential -J