diff --git a/gnome-desktop3.spec b/gnome-desktop3.spec
index 0993fd3..4807a20 100644
--- a/gnome-desktop3.spec
+++ b/gnome-desktop3.spec
@@ -8,7 +8,7 @@
 Summary: Shared code among gnome-panel, gnome-session, nautilus, etc
 Name: gnome-desktop3
 Version: 3.7.90
-Release: 1%{?dist}
+Release: 2%{?dist}
 URL: http://www.gnome.org
 Source0: http://download.gnome.org/sources/gnome-desktop/3.7/gnome-desktop-%{version}.tar.xz
 
@@ -43,6 +43,9 @@ BuildRequires: automake autoconf libtool intltool
 BuildRequires: itstool
 BuildRequires: iso-codes-devel
 
+# GnomeIdleMonitor API change breaks older gnome-shell versions
+Conflicts: gnome-shell < 3.7.90
+
 %description
 
 The gnome-desktop package contains an internal library
@@ -102,6 +105,9 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.a
 %doc %{_datadir}/gtk-doc/html/gnome-desktop3/
 
 %changelog
+* Thu Feb 21 2013 Kalev Lember <kalevlember@gmail.com> - 3.7.90-2
+- Conflict with older gnome-shell versions
+
 * Wed Feb 20 2013 Richard Hughes <rhughes@redhat.com> - 3.7.90-1
 - Update to 3.7.90