diff --git a/evolution.spec b/evolution.spec
index 60f103b..835245b 100644
--- a/evolution.spec
+++ b/evolution.spec
@@ -94,6 +94,7 @@ BuildRequires: libgnomecanvas-devel >= 2.0
 BuildRequires: libgdata-devel >= %{libgdata_version}
 BuildRequires: libgweather-devel >= %{libgweather_version}
 BuildRequires: libpst-devel
+BuildRequires: libSM-devel
 BuildRequires: libsoup-devel >= %{soup_version}
 BuildRequires: libtool >= 1.5
 BuildRequires: libxml2-devel