diff --git a/src/Menus.jsx b/src/Menus.jsx
index 9505a533..3b7164dd 100644
--- a/src/Menus.jsx
+++ b/src/Menus.jsx
@@ -115,7 +115,7 @@ class Menus extends React.Component {
       clearTimeout(this.delayTimer);
       this.delayTimer = null;
     }
-    if (onSelect) {
+    if (typeof onSelect === 'function') {
       this.delayTimer = setTimeout(() => {
         onSelect();
         this.delayTimer = null;