diff --git a/gnome-system-monitor.spec b/gnome-system-monitor.spec
index ed4aff5..42b8bbf 100644
--- a/gnome-system-monitor.spec
+++ b/gnome-system-monitor.spec
@@ -34,6 +34,7 @@ BuildRequires: gnome-doc-utils >= 0.3.2
 BuildRequires: gnome-common
 BuildRequires: libwnck3-devel
 BuildRequires: libxml2-devel
+BuildRequires: itstool
 
 # needed for autoreconf
 BuildRequires: autoconf, automake, libtool