diff --git a/textproc/idnits/Makefile b/textproc/idnits/Makefile
index a7223d36784c..8598a52b6c00 100644
--- a/textproc/idnits/Makefile
+++ b/textproc/idnits/Makefile
@@ -6,7 +6,6 @@ PORTVERSION=	2.13.00
 CATEGORIES=	textproc
 MASTER_SITES=	http://tools.ietf.org/tools/idnits/ \
 		LOCAL/sunpoet
-EXTRACT_SUFX=	.tgz
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Looks for problems in internet draft formatting
@@ -17,11 +16,11 @@ LICENSE_COMB=	dual
 RUN_DEPENDS=	${LOCALBASE}/bin/bash:${PORTSDIR}/shells/bash
 
 NO_BUILD=	yes
+USES=		shebangfix tar:tgz
 
 PLIST_FILES=	bin/${PORTNAME}
 
-post-patch:
-	@${REINPLACE_CMD} -e '1 s|^#!/bin/bash|#!${LOCALBASE}/bin/bash|' ${WRKSRC}/${PORTNAME}
+SHEBANG_FILES=	${PORTNAME}
 
 do-install:
 	@${INSTALL_SCRIPT} ${WRKSRC}/${PORTNAME} ${STAGEDIR}${PREFIX}/bin/