diff --git a/libvirt.spec.in b/libvirt.spec.in
index 3c544f17f81e83a9a12859ba25e61d3d3a9ed491..a78b11791201cc13e409be43bbe0b1dec51c11c6 100644
--- a/libvirt.spec.in
+++ b/libvirt.spec.in
@@ -355,7 +355,11 @@ BuildRequires: augeas
 BuildRequires: hal-devel
 %endif
 %if %{with_udev}
+%if 0%{?fedora} >= 18 || 0%{?rhel} >= 7
+BuildRequires: systemd-devel >= 185
+%else
 BuildRequires: libudev-devel >= 145
+%endif
 BuildRequires: libpciaccess-devel >= 0.10.9
 %endif
 %if %{with_yajl}
@@ -539,8 +543,12 @@ Requires: ebtables
 Requires: hal
 %endif
 %if %{with_udev}
+%if 0%{?fedora} >= 18 || 0%{?rhel} >= 7
+Requires: systemd >= 185
+%else
 Requires: udev >= 145
 %endif
+%endif
 %if %{with_polkit}
 %if 0%{?fedora} >= 12 || 0%{?rhel} >=6
 Requires: polkit >= 0.93