diff --git a/devel/stfl/Makefile b/devel/stfl/Makefile
index dadfb0a23128..10414460844f 100644
--- a/devel/stfl/Makefile
+++ b/devel/stfl/Makefile
@@ -1,41 +1,42 @@
 # Created by: Andrew Pantyukhin <infofarmer@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	stfl
 PORTVERSION=	0.22
 PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	http://www.clifford.at/stfl/
 
 MAINTAINER=	arved@FreeBSD.org
 COMMENT=	Structured Terminal Forms Language/Library
 
 LICENSE=	GPLv3
 
 USES=		gmake iconv:wchar_t ncurses
 USE_LDCONFIG=	yes
 
 PLIST_FILES=	include/stfl.h lib/libstfl.a lib/libstfl.so lib/libstfl.so.0 \
 		lib/libstfl.so.0.22 libdata/pkgconfig/stfl.pc
 CFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib ${ICONV_LIB}
 MAKE_ENV=	LDLIBS="${LDFLAGS}"
 
 post-patch:
-	@${REINPLACE_CMD} -e 's|-Os||;/gcc/d;/pkgconfig/s|$$(libdir)|libdata|' \
+	@${REINPLACE_CMD} -e 's|-Os||;/gcc/d;/-MM/s|-I.|$${CFLAGS}|; \
+		/pkgconfig/s|$$(libdir)|libdata|' \
 		${WRKSRC}/Makefile
 	@${REINPLACE_CMD} -e '/Libs.private/s|$$| ${ICONV_LIB}|' \
 		${WRKSRC}/stfl.pc.in
 	@${REINPLACE_CMD} -e 's|ncursesw/|${NCURSESINC}/|'\
 		${WRKSRC}/stfl_internals.h
 	@${ECHO_CMD} 'prefix = ${PREFIX}' > ${WRKSRC}/Makefile.cfg
 	@${ECHO_CMD} 'libdir = lib' >> ${WRKSRC}/Makefile.cfg
 
 pre-build:
 	@cd ${BUILD_WRKSRC}; ${SETENV} ${MAKE_ENV}\
 		${MAKE_CMD} ${MAKE_FLAGS} ${MAKEFILE} ${MAKE_ARGS} Makefile.deps
 
 post-install:
 	${LN} -s libstfl.so.0.22 ${STAGEDIR}${PREFIX}/lib/libstfl.so.0
 
 .include <bsd.port.mk>