diff --git a/addon/components/listbox.js b/addon/components/listbox.js
index 79a791c..1f801eb 100644
--- a/addon/components/listbox.js
+++ b/addon/components/listbox.js
@@ -57,6 +57,7 @@ export default class ListboxComponent extends Component {
   @action
   handleButtonClick(e) {
     if (e.button !== 0) return;
+    e.preventDefault();
     this.activateBehaviour = ACTIVATE_NONE;
     this.isOpen = !this.isOpen;
   }