diff --git a/security/libtasn1/Makefile b/security/libtasn1/Makefile
index 624a067dc2e1..72c898ac460c 100644
--- a/security/libtasn1/Makefile
+++ b/security/libtasn1/Makefile
@@ -1,44 +1,37 @@
 # Created by: Sergei Kolobov <sergei@kolobov.com>
 
 PORTNAME=	libtasn1
 PORTVERSION=	4.18.0
 CATEGORIES=	security
 MASTER_SITES=	GNU \
 		GNUPG/gnutls/${PORTNAME}
 
 MAINTAINER=	novel@FreeBSD.org
 COMMENT=	ASN.1 structure parser library
 
 LICENSE=	LGPL21+ GPLv3
 LICENSE_COMB=	multi
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-USES=		cpe libtool pathfix pkgconfig compiler
+USES=		cpe libtool pathfix pkgconfig
 USE_CSTD=	c99
 USE_LDCONFIG=	yes
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
 CPE_VENDOR=	gnu
 
 OPTIONS_DEFINE=	DOCS
 
 TEST_TARGET=	check
 
 DOCS=		AUTHORS NEWS README.md THANKS doc/TODO
 INFO=		libtasn1
 
 DOCS_CONFIGURE_ENABLE=	gtk-doc
 DOCS_BUILD_DEPENDS=	gtkdoc-check:textproc/gtk-doc
 
-.include <bsd.port.pre.mk>
-
-# https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252548
-.if ${CHOSEN_COMPILER_TYPE} == clang && ${COMPILER_VERSION} >= 100
-CFLAGS:=		${CFLAGS:C/-O[2-9]/-O1/g}
-.endif
-
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	cd ${WRKSRC} && ${INSTALL_DATA} ${DOCS} ${STAGEDIR}${DOCSDIR}
 
-.include <bsd.port.post.mk>
+.include <bsd.port.mk>