diff --git a/security/p5-Crypt-OpenSSL-Bignum/Makefile b/security/p5-Crypt-OpenSSL-Bignum/Makefile
index 99139c278817..fdd722fc2467 100644
--- a/security/p5-Crypt-OpenSSL-Bignum/Makefile
+++ b/security/p5-Crypt-OpenSSL-Bignum/Makefile
@@ -1,21 +1,23 @@
 # New ports collection makefile for:    p5-Crypt-OpenSSL-Bignum
 # Date created:				Sep. 4, 2003
 # Whom:					erwin@FreeBSD.org
 #
 # $FreeBSD$
 #
 
 PORTNAME=	Crypt-OpenSSL-Bignum
 PORTVERSION=	0.04
 CATEGORIES=	security perl5
 MASTER_SITES=	CPAN
 PKGNAMEPREFIX=	p5-
 
 MAINTAINER=	perl@FreeBSD.org
 COMMENT=	OpenSSL's multiprecision integer arithmetic
 
 PERL_CONFIGURE=	yes
+USE_OPENSSL=	yes
+MAKE_ARGS+=	PASTHRU_INC=-I${OPENSSLINC}
 
 MAN3=		Crypt::OpenSSL::Bignum::CTX.3 Crypt::OpenSSL::Bignum.3
 
 .include <bsd.port.mk>