diff --git a/graphics/rubygem-opengl/Makefile b/graphics/rubygem-opengl/Makefile
index 4692e71b07ee..b378046e374c 100644
--- a/graphics/rubygem-opengl/Makefile
+++ b/graphics/rubygem-opengl/Makefile
@@ -1,19 +1,23 @@
 # Whom:			Steve Wills <steve@meatwad.mouf.net>
 # $FreeBSD$
 
 PORTNAME=	opengl
 PORTVERSION=	0.8.0
 CATEGORIES=	graphics ruby
 MASTER_SITES=	RG
 DIST_SUBDIR=	ruby
 
 MAINTAINER=	ruby@FreeBSD.org
 COMMENT=	OpenGL/GLU/GLUT interface modules for Ruby
 
 USE_RUBY=	yes
 USE_RAKE=	yes
 USE_RUBYGEMS=	yes
 USE_GL=		glut
 RUBYGEM_AUTOPLIST=	yes
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+.if ${RUBY_VER} == 1.8
+IGNORE=	Does not work with Ruby 1.8
+.endif
+.include <bsd.port.post.mk>