diff --git a/x11-themes/xfce-icons-elementary/Makefile b/x11-themes/xfce-icons-elementary/Makefile
index 7ffdbb9a8ac1..29ebbddb6887 100644
--- a/x11-themes/xfce-icons-elementary/Makefile
+++ b/x11-themes/xfce-icons-elementary/Makefile
@@ -1,30 +1,31 @@
 PORTNAME=	elementary
 PORTVERSION=	0.18
 DISTVERSIONPREFIX=v
 CATEGORIES=	x11-themes xfce
 PKGNAMEPREFIX=	xfce-icons-
 
 MAINTAINER=	xfce@FreeBSD.org
 COMMENT=	Elementary icons, extended and maintained for Xfce
 WWW=		https://github.com/shimmerproject/elementary-xfce
 
 LICENSE=	GPLv2
 
 BUILD_DEPENDS=	optipng:graphics/optipng
 
 USES=		compiler:c11 gnome pkgconfig
 USE_GNOME=	gdkpixbuf2:build gtk30:build
 
 HAS_CONFIGURE=	yes
+CONFIGURE_ARGS=	--prefix="${PREFIX}"
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	shimmerproject
 GH_PROJECT=	elementary-xfce
 
 NO_ARCH=	yes
 
 post-patch:
-	${REINPLACE_CMD} -e 's|\/$$(PREFIX)|$$(PREFIX)|g' \
-		${WRKSRC}/Makefile.in
+	@${REINPLACE_CMD} -e 's|-O0|${CFLAGS}|' \
+		${WRKSRC}/svgtopng/Makefile
 
 .include <bsd.port.mk>