diff --git a/book/src/chapter_1.md b/book/src/chapter_1.md
index ba7ff430ebe2e0a1ae47f91249c5f09e1929f04b..aede01cc575233047581469a61b4d26f69b7580d 100644
--- a/book/src/chapter_1.md
+++ b/book/src/chapter_1.md
@@ -20,6 +20,7 @@ fn startup(
     font_mapping.set_default(asset_server.load("roboto.kayak_font"));
 
     let mut widget_context = KayakRootContext::new();
+    widget_context.add_plugin(KayakWidgetsContextPlugin);
     let parent_id = None;
 
     // The rsx! macro expects a parent_id, a widget_context from the user.