diff --git a/help/meson.build b/help/meson.build
index ec3e5b6f..b2aec10d 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -1,4 +1,6 @@
 if get_option('help')
+  find_program('itstool', required: true)
+
   gnome.yelp('sysprof',
     sources: ['index.page', 'introduction.page', 'profiling.page', 'faq.page', 'legal.xml'],
   )