diff --git a/lib/ace/keyboard/textinput.js b/lib/ace/keyboard/textinput.js
index c4883808..fc465db6 100644
--- a/lib/ace/keyboard/textinput.js
+++ b/lib/ace/keyboard/textinput.js
@@ -185,7 +185,7 @@ var TextInput = function(parentNode, host) {
         }
     });
 
-    if ("onbeforecopy" in text) {
+    if ("onbeforecopy" in text && typeof clipboardData !== "undefined") {
         event.addListener(text, "beforecopy", function(e) {
             var copyText = host.getCopyText();
             if(copyText)