diff --git a/textproc/ruby-rdtool/Makefile b/textproc/ruby-rdtool/Makefile
index 675590382c6a..6481d9ff2410 100644
--- a/textproc/ruby-rdtool/Makefile
+++ b/textproc/ruby-rdtool/Makefile
@@ -14,6 +14,7 @@ BUILD_DEPENDS=	racc:devel/rubygem-racc
 USES=	ruby:setup
 USE_GITHUB=	yes
 GH_ACCOUNT=	uwabami
+BROKEN_RUBY32=	yes
 
 RUBY_MODNAME=	rd