diff --git a/security/libtasn1/Makefile b/security/libtasn1/Makefile
index 0ff4149f9302..f3db2b871374 100644
--- a/security/libtasn1/Makefile
+++ b/security/libtasn1/Makefile
@@ -28,15 +28,8 @@ DOCS=		AUTHORS NEWS README.md THANKS doc/TODO \
 		doc/libtasn1.html doc/libtasn1.pdf doc/libtasn1.ps
 INFO=		libtasn1
 
-.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>