diff --git a/lib/ace/lib/event.js b/lib/ace/lib/event.js
index bb74f34c..1da47ac4 100644
--- a/lib/ace/lib/event.js
+++ b/lib/ace/lib/event.js
@@ -141,9 +141,9 @@ else {
 }
 
 exports.addMouseWheelListener = function(el, callback) {
-    var factor = 8;
-    var listener = function(e) {
-        if (e.wheelDelta !== undefined) {
+    if ("onmousewheel" in el) {
+        var factor = 8;
+        exports.addListener(el, "DOMMouseScroll", function(e) {
             if (e.wheelDeltaX !== undefined) {
                 e.wheelX = -e.wheelDeltaX / factor;
                 e.wheelY = -e.wheelDeltaY / factor;
@@ -151,8 +151,16 @@ exports.addMouseWheelListener = function(el, callback) {
                 e.wheelX = 0;
                 e.wheelY = -e.wheelDelta / factor;
             }
-        }
-        else {
+            callback(e);
+        });
+    } else if ("onwheel" in el) {
+        exports.addListener(el, "wheel",  function(e) {
+            e.wheelX = (e.deltaX || 0) * 5;
+            e.wheelY = (e.deltaY || 0) * 5;
+            callback(e);
+        });
+    } else {
+        exports.addListener(el, "DOMMouseScroll", function(e) {
             if (e.axis && e.axis == e.HORIZONTAL_AXIS) {
                 e.wheelX = (e.detail || 0) * 5;
                 e.wheelY = 0;
@@ -160,11 +168,9 @@ exports.addMouseWheelListener = function(el, callback) {
                 e.wheelX = 0;
                 e.wheelY = (e.detail || 0) * 5;
             }
-        }
-        callback(e);
-    };
-    exports.addListener(el, "DOMMouseScroll", listener);
-    exports.addListener(el, "mousewheel", listener);
+            callback(e);
+        });
+    }
 };
 
 exports.addMultiMouseDownListener = function(el, timeouts, eventHandler, callbackName) {