diff --git a/lib/ace/keyboard/textinput.js b/lib/ace/keyboard/textinput.js
index e4ba3e1c..49c93116 100644
--- a/lib/ace/keyboard/textinput.js
+++ b/lib/ace/keyboard/textinput.js
@@ -206,7 +206,7 @@ var TextInput = function(parentNode, host) {
         });
         event.addListener(text, "cut", onCut); // for ie9 context menu
     }
-    else if (useragent.isOpera) {
+    else if (useragent.isOpera && !("KeyboardEvent" in window)) {
         event.addListener(parentNode, "keydown", function(e) {
             if ((useragent.isMac && !e.metaKey) || !e.ctrlKey)
                 return;