diff --git a/sane-backends.spec b/sane-backends.spec
index f499e35..f6b2ce1 100644
--- a/sane-backends.spec
+++ b/sane-backends.spec
@@ -33,7 +33,7 @@
 Summary: Scanner access software
 Name: sane-backends
 Version: 1.0.27
-Release: 4%{?dist}
+Release: 5%{?dist}
 # lib/ is LGPLv2+, backends are GPLv2+ with exceptions
 # Tools are GPLv2+, docs are public domain
 # see LICENSE for details
@@ -69,6 +69,7 @@ BuildRequires: gphoto2-devel
 BuildRequires: systemd-devel
 BuildRequires: systemd
 Requires: systemd >= 196
+Requires: systemd-udev >= 196
 Requires: sane-backends-libs%{?_isa} = %{?epoch:%{epoch}:}%{version}-%{release}
 # Don't drag around obsoletes forever
 %if ! (0%{?fedora} >= 27 || 0%{?rhel} >= 8)
@@ -276,7 +277,7 @@ exit 0
 %systemd_postun saned.socket
 
 %files -f %{name}.lang
-%docdir %{_maindocdir}
+%dir %{_maindocdir}
 %doc %{_maindocdir}/AUTHORS
 %doc %{_maindocdir}/ChangeLog
 %doc %{_maindocdir}/NEWS
@@ -327,6 +328,10 @@ exit 0
 %{_unitdir}/saned@.service
 
 %changelog
+* Tue Aug 15 2017 Zdenek Dohnal <zdohnal@redhat.com> - 1.0.27-5
+- requiring systemd-udev, because sane-backends puts files into its directories
+  and own maindocdir
+
 * Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.0.27-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild