diff --git a/devel/ruby-open4/Makefile b/devel/ruby-open4/Makefile
index 378c8a2978b0..ff4d29232d83 100644
--- a/devel/ruby-open4/Makefile
+++ b/devel/ruby-open4/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.3 2015/02/01 16:08:38 taca Exp $
+# $NetBSD: Makefile,v 1.4 2023/01/09 06:29:07 taca Exp $
 
 DISTNAME=	open4-1.3.4
 PKGNAME=	${RUBY_PKGPREFIX}-${DISTNAME:S/_/-/g}
@@ -9,5 +9,7 @@ HOMEPAGE=	https://github.com/ahoward/open4
 COMMENT=	Ruby library to manage child processes
 LICENSE=	mit
 
+USE_LANGUAGES=	# none
+
 .include "../../lang/ruby/gem.mk"
 .include "../../mk/bsd.pkg.mk"