Index: head/math/p5-Math-String/Makefile
===================================================================
--- head/math/p5-Math-String/Makefile	(revision 443758)
+++ head/math/p5-Math-String/Makefile	(revision 443759)
@@ -1,23 +1,28 @@
 # Created by: Steve Wills <swills@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	Math-String
 PORTVERSION=	1.29
+PORTREVISION=	1
 CATEGORIES=	math perl5
 MASTER_SITES=	CPAN
 PKGNAMEPREFIX=	p5-
 
 MAINTAINER=	perl@FreeBSD.org
 COMMENT=	Perl module to calculate with strings as if they were big integers
 
 LICENSE=	ART10 GPLv1
 LICENSE_COMB=	dual
 
-BUILD_DEPENDS=	p5-Math-BigInt>=1.999802:math/p5-Math-BigInt
-RUN_DEPENDS:=	${BUILD_DEPENDS}
-
 NO_ARCH=	yes
 USES=		perl5
 USE_PERL5=	configure
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${PERL_LEVEL} < 502508
+BUILD_DEPENDS+=	p5-Math-BigInt>=1.999802:math/p5-Math-BigInt
+RUN_DEPENDS+=	p5-Math-BigInt>=1.999802:math/p5-Math-BigInt
+.endif
+
+.include <bsd.port.post.mk>