diff --git a/sane-backends.spec b/sane-backends.spec
index 7aafe21..a298dbf 100644
--- a/sane-backends.spec
+++ b/sane-backends.spec
@@ -33,6 +33,7 @@ BuildRequires: libv4l-devel
 BuildRequires: gettext
 BuildRequires: gphoto2-devel
 Requires: udev >= 143
+Requires: sane-backends-libs%{?_isa} = %{?epoch:%{epoch}:}%{version}-%{release}
 
 %description
 Scanner Access Now Easy (SANE) is a universal scanner interface.  The
@@ -167,6 +168,9 @@ rm -rf %{buildroot}
 %{_libdir}/pkgconfig/sane-backends.pc
 
 %changelog
+* Mon Nov 08 2010 Nils Philippsen <nils@redhat.com>
+- let sane-backends require arch-specific version/release of -libs (#621217)
+
 * Wed Nov 03 2010 Nils Philippsen <nils@redhat.com> - 1.0.21-4
 - xerox_mfp: correct color mode malfunction (#614949)
 - xerox_mfp: add USB id for SCX-4500W (#614948)