diff --git a/gnome-system-monitor.spec b/gnome-system-monitor.spec
index 9e9d5d8..81072e3 100644
--- a/gnome-system-monitor.spec
+++ b/gnome-system-monitor.spec
@@ -1,6 +1,6 @@
 # Note that this is NOT a relocatable package
 
-%define libgtop2_version 2.9.5
+%define libgtop2_version 2.19.3
 %define libwnck_version 2.9.92
 %define pango_version 1.2.0
 %define gtk2_version 2.6.0
@@ -23,6 +23,7 @@ BuildRequires: libgtop2-devel >= %{libgtop2_version}
 BuildRequires: libwnck-devel >= %{libwnck_version}
 BuildRequires: pango-devel >= %{pango_version}
 BuildRequires: gtk2-devel >= %{gtk2_version}
+BuildRequires: gtkmm24-devel
 BuildRequires: desktop-file-utils >= %{desktop_file_utils_version}
 BuildRequires: startup-notification-devel
 BuildRequires: intltool scrollkeeper gettext