diff --git a/xfce4-session.changes b/xfce4-session.changes
index a050892..937e5e0 100644
--- a/xfce4-session.changes
+++ b/xfce4-session.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Feb 20 13:20:27 UTC 2012 - gber@opensuse.org
+
+- added missing build dependency on libSM-devel
+
 -------------------------------------------------------------------
 Sun Feb 12 20:27:03 UTC 2012 - gber@opensuse.org
 
diff --git a/xfce4-session.spec b/xfce4-session.spec
index 794c3b2..806c06e 100644
--- a/xfce4-session.spec
+++ b/xfce4-session.spec
@@ -48,6 +48,7 @@ BuildRequires:  pkgconfig(libxfce4ui-1)
 BuildRequires:  pkgconfig(libxfce4util-1.0)
 BuildRequires:  pkgconfig(libxfcegui4-1.0)
 BuildRequires:  pkgconfig(libxfconf-0)
+BuildRequires:  pkgconfig(sm)
 Requires:       %{name}-branding >= %{version}
 Requires:       xfce-utils
 Recommends:     fortune