diff --git a/book/listings/hello_world/2/main.rs b/book/listings/hello_world/2/main.rs
index 5b8675e491c8..975970476086 100644
--- a/book/listings/hello_world/2/main.rs
+++ b/book/listings/hello_world/2/main.rs
@@ -11,7 +11,7 @@ fn main() -> glib::ExitCode {
     app.connect_activate(build_ui);
 
     // Run the application
-    app.run()
+    app.run();
     
     // Suggesting this line, because there is a compilation error without it
     return glib::ExitCode::SUCCESS;