diff --git a/src/app/ui/modaldialog.js b/src/app/ui/modaldialog.js
index 023b2f181c..d36944cb0f 100644
--- a/src/app/ui/modaldialog.js
+++ b/src/app/ui/modaldialog.js
@@ -40,6 +40,7 @@ module.exports = (title, content, ok, cancel) => {
   }
 
   function modalKeyEvent (e) {
+    e.preventDefault()
     if (e.keyCode === 27) {
       cancelListener()
     } else if (e.keyCode === 13) {