diff --git a/Makefile b/Makefile
index b9f75b5ff7c59acac1d43a35c77f1266b3fac69b..c96d6553722d37a03874ca2a03dda0f41971ed27 100644
--- a/Makefile
+++ b/Makefile
@@ -122,7 +122,7 @@ defsystem-files:
 archive: build/asdf.lisp
 	$(eval UIOPDIR := "uiop-$(version)")
 	mkdir -p build/$(UIOPDIR) 	# UIOP tarball
-	cp -pHux uiop/README.md uiop/uiop.asd uiop/asdf-driver.asd ${driver_lisp} contrib/debug.lisp build/$(UIOPDIR)
+	cp -pHux uiop/README.md uiop/uiop.asd uiop/asdf-driver.asd ${driver_lisp} uiop/contrib/debug.lisp build/$(UIOPDIR)
 	tar zcf "build/uiop-${version}.tar.gz" -C build $(UIOPDIR)
 	rm -r build/$(UIOPDIR)
 	$(eval ASDFDIR := "asdf-$(version)")