diff --git a/cad/oregano/Makefile b/cad/oregano/Makefile
index 93ca60fd86d8..f54fc9bdcb90 100644
--- a/cad/oregano/Makefile
+++ b/cad/oregano/Makefile
@@ -1,32 +1,38 @@
 PORTNAME=	oregano
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.84.43
 PORTREVISION=	4
 CATEGORIES=	cad
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Schematic capture and circuit simulator
 WWW=		https://ahoi.io/
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	nroff:textproc/groff
 LIB_DEPENDS=	libgoocanvas-2.0.so:graphics/goocanvas2
 
 USES=		compiler:c11 desktop-file-utils gettext gnome pkgconfig \
 		shared-mime-info waf
 USE_GITHUB=	yes
 GH_ACCOUNT=	drahnr
 USE_GNOME=	atk cairo gdkpixbuf2 glib20 gtk30 gtksourceview3 intltool libxml2 pango
 
 GLIB_SCHEMAS=	io.ahoi.oregano.gschema.xml
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400091 || ( ${OSVERSION} >= 1302507 && ${OSVERSION} < 1400000 ))
+CFLAGS+=	-Wno-error=incompatible-function-pointer-types
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} 's|$${MANDIR}|${MANPREFIX}/man|' ${WRKSRC}/data/wscript
 
 post-stage:
 	@cd ${STAGEDIR}${PREFIX} && ${STRIP_CMD} bin/oregano bin/microtests
 	${RM} ${STAGEDIR}${PREFIX}/share/glib-2.0/schemas/gschemas.compiled
 
 .include <bsd.port.mk>