diff --git a/lang/eisl/Makefile b/lang/eisl/Makefile
index e719a321f995..3130a72c137c 100644
--- a/lang/eisl/Makefile
+++ b/lang/eisl/Makefile
@@ -1,35 +1,41 @@
 PORTNAME=	eisl
 DISTVERSIONPREFIX=	v
 DISTVERSION=	2.85
 CATEGORIES=	lang devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Interpreter and compiler compatible with ISLisp standard
 WWW=		https://github.com/sasagawa888/eisl
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/license.txt
 
 BROKEN_i386=	stage breaks: data segment of more than 500GB is required, see https://github.com/sasagawa888/eisl/issues/218
 
 TEST_DEPENDS=	cppcheck:devel/cppcheck
 
 USES=		gmake ncurses:port # port because tests need ncurses6-config
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	sasagawa888
 
 ALL_TARGET=	${PORTNAME}
 TEST_TARGET=	check # tests print some errors and warnings, see https://github.com/sasagawa888/eisl/issues/181#issuecomment-1195147029
 
 MAKEFILE=	makefile
 
 LDFLAGS+=	-lncursesw
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == powerpc64 || ${ARCH} == riscv64
 EXTRA_PATCHES=	${FILESDIR}/extra-patch-makefile
 .endif
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400079
+CFLAGS+=	-Wno-error=int-conversion
+.endif
+
+.include <bsd.port.post.mk>