diff --git a/devel/rubygem-rails-observers/Makefile b/devel/rubygem-rails-observers/Makefile
index 18d4329414c0..8a6686e0baf1 100644
--- a/devel/rubygem-rails-observers/Makefile
+++ b/devel/rubygem-rails-observers/Makefile
@@ -13,6 +13,7 @@ LICENSE=	MIT
 
 RUN_DEPENDS=	rubygem-activemodel4>=4.0:${PORTSDIR}/databases/rubygem-activemodel4
 
+NO_ARCH=	yes
 USE_RUBY=	yes
 USE_RUBYGEMS=	yes
 RUBYGEM_AUTOPLIST=	yes