diff --git a/math/gnome-calculator/Makefile b/math/gnome-calculator/Makefile
index b3150818a948..4756a2fc9130 100644
--- a/math/gnome-calculator/Makefile
+++ b/math/gnome-calculator/Makefile
@@ -1,32 +1,32 @@
 # Created by: Gustau Perez i Querol <gustau.perez@gmail.com>
 
 PORTNAME=	gnome-calculator
 PORTVERSION=	40.1
 CATEGORIES=	math gnome
-MASTER_SITES=	GNOME
+MASTER_SITES=	GNOME/sources/${PORTNAME}/${PORTVERSION:C/^([0-9]+)\..*/\1/}
 DIST_SUBDIR=	gnome
 
 MAINTAINER=	gnome@FreeBSD.org
 COMMENT=	GNOME 3 calculator tool
 
 LICENSE=	GPLv3+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	vala:lang/vala \
 		itstool:textproc/itstool
 LIB_DEPENDS=	libmpfr.so:math/mpfr \
 		libmpc.so:math/mpc \
 		libsoup-2.4.so:devel/libsoup \
 		libgee-0.8.so:devel/libgee \
 		libhandy-1.so:x11-toolkits/libhandy
 
 PORTSCOUT=	limitw:1,even
 
 USES=		compiler:c11 gettext gnome localbase:ldflags meson \
 		pkgconfig python:3.6+,build tar:xz
 USE_GNOME=	gtksourceview4 introspection libxml2
 BINARY_ALIAS=	python3=${PYTHON_VERSION}
 
 GLIB_SCHEMAS=	org.gnome.calculator.gschema.xml
 
 .include <bsd.port.mk>