diff --git a/net/unison/2.4x/Makefile b/net/unison/2.4x/Makefile
index f63e8bbbdbe..54c6d334bcc 100644
--- a/net/unison/2.4x/Makefile
+++ b/net/unison/2.4x/Makefile
@@ -1,11 +1,13 @@
-# $OpenBSD: Makefile,v 1.1 2018/04/26 21:34:23 bket Exp $
+# $OpenBSD: Makefile,v 1.2 2018/05/02 08:08:11 bket Exp $
 
 VER=		2.48.15
 REV=		v3
 REVISION=	0
 GH_TAGNAME=	v${VER}${REV}
 DISTNAME=	${GH_PROJECT}-${VER}
- 
+
+PORTROACH=	limit:^2\.4
+
 WRKDIST=	${WRKDIR}/${PKGNAME}${REV}/src
 
 .include <bsd.port.mk>