diff --git a/gnome-system-monitor.spec b/gnome-system-monitor.spec
index bf0bf22..e02e719 100644
--- a/gnome-system-monitor.spec
+++ b/gnome-system-monitor.spec
@@ -35,6 +35,7 @@ BuildRequires: pcre-devel
 BuildRequires: librsvg2-devel
 BuildRequires: gnome-doc-utils >= 0.3.2
 BuildRequires: gnome-common
+BuildRequires: polkit-devel >= %{polkit_version}
 
 # needed for autoreconf
 BuildRequires: autoconf, automake, libtool