diff --git a/examples/calculator.rs b/examples/calculator.rs
index bc7f13459..648ccfbc3 100644
--- a/examples/calculator.rs
+++ b/examples/calculator.rs
@@ -62,6 +62,7 @@ fn app(cx: Scope) -> Element {
         div { id: "wrapper",
             div { class: "app",
                 div { class: "calculator",
+                    tabindex: "0",
                     onkeydown: handle_key_down_event,
                     div { class: "calculator-display", val.to_string() }
                     div { class: "calculator-keypad",