diff --git a/nsd.spec b/nsd.spec
index dfbf6cc..3b79a4a 100644
--- a/nsd.spec
+++ b/nsd.spec
@@ -13,13 +13,16 @@ Url: http://www.nlnetlabs.nl/nsd/
 Group: System Environment/Daemons
 Source0: http://www.nlnetlabs.nl/downloads/%{name}/%{name}-%{version}%{?prever}.tar.gz
 Source1: nsd.conf
+%if %{with systemd}
 Source2: nsd.service
 Source3: nsd-keygen.service
 Source4: nsd-write.service
 Source5: nsd-write.timer
 Source6: tmpfiles-nsd.conf
+%else
 Source10: nsd.init
 Source12: nsd.sysconfig
+%endif
 BuildRequires: flex
 BuildRequires: openssl-devel
 BuildRequires: libevent-devel