diff --git a/clamav-unofficial-sigs.spec b/clamav-unofficial-sigs.spec
index 584e80f..5acc86a 100644
--- a/clamav-unofficial-sigs.spec
+++ b/clamav-unofficial-sigs.spec
@@ -1,16 +1,26 @@
+%if 0%{?fedora} >= 17 || 0%{?rhel} >= 7
+%global with_systemd 1
+%else
+%global with_systemd 0
+%endif
 Name:           clamav-unofficial-sigs
 Version:        5.6.2
 Release:        4%{?dist}
 Summary:        Scripts to download unoffical clamav signatures 
+Group:          Applications/System
 License:        BSD
 URL:            https://github.com/extremeshok/%{name}
 Source0:        https://github.com/extremeshok/%{name}/archive/%{version}.tar.gz
 BuildArch:      noarch
 BuildRequires:  bind-utils
 BuildRequires:  rsync
+%if %{with_systemd}
 BuildRequires:  systemd
+%endif
 Requires:       clamav clamav-update rsync gnupg diffutils curl bind-utils
+%if %{with_systemd}
 Requires(post): systemd-sysv
+%endif
 
 %description
 This package contains scripts and configuration files
@@ -43,7 +53,7 @@ EOF
 
 %build
 bash clamav-unofficial-sigs.sh -c ./build.conf --install-all
-%if 0%{?rhel} == 7
+%if 0%{?rhel} <= 7
 sed -i -e '/^#pkg_mgr/ s/^#//;s/""/"yum"/' config/master.conf
 %else
 sed -i -e '/^#pkg_mgr/ s/^#//;s/""/"dnf"/' config/master.conf
@@ -66,7 +76,11 @@ install -d -p %{buildroot}%{_sysconfdir}/logrotate.d
 install -d -p %{buildroot}%{_mandir}/man8
 install -p -m0755 clamav-unofficial-sigs.sh %{buildroot}%{_sbindir}/clamav-unofficial-sigs.sh
 # config/os.centos7.conf file is for epel and fedora
+%if 0%{?fedora} >= 17 || 0%{?rhel} >= 7
 install -p -m0644 config/os.centos7.conf %{buildroot}%{_sysconfdir}/%{name}/os.conf
+%else
+install -p -m0644 config/os.centos6.conf %{buildroot}%{_sysconfdir}/%{name}/os.conf
+%endif
 install -p -m0644 config/user.conf %{buildroot}%{_sysconfdir}/%{name}/user.conf
 install -p -m0644 config/master.conf %{buildroot}%{_sysconfdir}/%{name}/master.conf
 install -Dp -m 0644 systemd/clamav-unofficial-sigs.service %{buildroot}%{_unitdir}/clamav-unofficial-sigs.service
@@ -75,6 +89,9 @@ install -p -m0644 clamav-unofficial-sigs.cron %{buildroot}%{_sysconfdir}/cron.d/
 install -p -m0644 clamav-unofficial-sigs.logrotate %{buildroot}%{_sysconfdir}/logrotate.d/clamav-unofficial-sigs
 install -p -m0644 clamav-unofficial-sigs.8 %{buildroot}%{_mandir}/man8/clamav-unofficial-sigs.8
 
+%clean
+rm -rf %{buildroot}
+
 %files
 %doc README.md INSTALL 
 %license LICENSE
@@ -85,13 +102,18 @@ install -p -m0644 clamav-unofficial-sigs.8 %{buildroot}%{_mandir}/man8/clamav-un
 %{_sbindir}/clamav-unofficial-sigs.sh
 %attr(0755,clamupdate,clamupdate) %dir %{_localstatedir}/lib/%{name}
 %attr(0755,clamupdate,clamupdate) %dir %{_localstatedir}/log/%{name}
+%if %{with_systemd}
 %{_unitdir}/%{name}.service
 %{_unitdir}/%{name}.timer
+%endif
 %{_sysconfdir}/cron.d/%{name}
 %{_sysconfdir}/logrotate.d/%{name}
 %{_mandir}/man*/%{name}*
 
 %changelog
+* Thu Feb 28 2019 Didier Fabert <didier.fabert@gmail.com> 5.6.2-4
+- Fix spec for el6 build
+
 * Thu Jan 31 2019 Fedora Release Engineering <releng@fedoraproject.org> - 5.6.2-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild