diff --git a/lang/intercal/Makefile b/lang/intercal/Makefile
index 3b236f637850..4f817196ed85 100644
--- a/lang/intercal/Makefile
+++ b/lang/intercal/Makefile
@@ -1,24 +1,24 @@
 # Created by: Matthew Hunt <mph@FreeBSD.org>
 
 PORTNAME=	intercal
 PORTVERSION=	0.31
 CATEGORIES=	lang
 MASTER_SITES=	http://www.catb.org/~esr/intercal/
 
-MAINTAINER=	ports@FreeBSD.org
+MAINTAINER=	fuz@fuz.su
 COMMENT=	C-INTERCAL compiler, ick, and supporting libraries
 
 LICENSE=	GPLv2
 
 USES=		gmake
 GNU_CONFIGURE=	yes
-CFLAGS+=	-D_POSIX_SOURCE
+CFLAGS+=	-D_POSIX_C_SOURCE=200809L
 DATADIR=	${PREFIX}/share/ick
 
 INFO=		ick
 
 post-patch:
 	@${REINPLACE_CMD} -e '/ICK_SPECIFIC_SUBDIR/s/-@PACKAGE_VERSION@// ' \
 		${WRKSRC}/buildaux/Makefile.in
 
 .include <bsd.port.mk>