diff --git a/sane-backends.spec b/sane-backends.spec
index 47f1913..3c871e4 100644
--- a/sane-backends.spec
+++ b/sane-backends.spec
@@ -8,9 +8,9 @@ Summary:           Scanner access software
 License:           GPLv2+ and GPLv2+ with exceptions and Public Domain and IJG and LGPLv2+ and MIT
 URL:               http://www.sane-project.org
 Source0:           https://gitlab.com/sane-project/backends/uploads/9e718daff347826f4cfe21126c8d5091/%{name}-%{version}.tar.gz
-Source2:           saned.socket
-Source3:           saned@.service.in
-Source4:           66-saned.rules
+Source1:           saned.socket
+Source2:           saned@.service.in
+Source3:           66-saned.rules
 
 BuildRequires:     gcc-c++ texlive-latex libusbx-devel libieee1284-devel libjpeg-devel libpng-devel
 BuildRequires:     libtiff-devel libv4l-devel gettext systemd-devel gphoto2-devel systemd
@@ -102,7 +102,7 @@ install -d %{buildroot}%{_prefix}/lib/udev/rules.d
 install -d %{buildroot}%{_prefix}/lib/udev/hwdb.d
 install -m 0644 tools/udev/sane-backends.rules %{buildroot}%{_prefix}/lib/udev/rules.d/65-sane-backends.rules
 install -m 0644 tools/udev/sane-backends.hwdb %{buildroot}%{_prefix}/lib/udev/hwdb.d/20-sane-backends.hwdb
-install -m 0644 %{SOURCE4} %{buildroot}%{_prefix}/lib/udev/rules.d/66-saned.rules
+install -m 0644 %{SOURCE3} %{buildroot}%{_prefix}/lib/udev/rules.d/66-saned.rules
 
 install -d %{buildroot}%{_libdir}/pkgconfig
 install -m 0644 tools/sane-backends.pc %{buildroot}%{_libdir}/pkgconfig/
@@ -128,8 +128,8 @@ done
 cd -
 
 install -m 755 -d %{buildroot}%{_unitdir}
-install -m 644 %{SOURCE2} %{buildroot}%{_unitdir}
-sed 's|@CONFIGDIR@|%{_sysconfdir}/sane.d|g' < %{SOURCE3} > saned@.service
+install -m 644 %{SOURCE1} %{buildroot}%{_unitdir}
+sed 's|@CONFIGDIR@|%{_sysconfdir}/sane.d|g' < %{SOURCE2} > saned@.service
 install -m 644 saned@.service %{buildroot}%{_unitdir}
 
 %find_lang sane-backends