diff --git a/lib/ace/lib/event.js b/lib/ace/lib/event.js
index 87da2cb2..9d03f868 100644
--- a/lib/ace/lib/event.js
+++ b/lib/ace/lib/event.js
@@ -108,11 +108,6 @@ exports.getButton = function(e) {
 
 if (document.documentElement.setCapture) {
     exports.capture = function(el, eventHandler, releaseCaptureHandler) {
-        function onMouseMove(e) {
-            eventHandler(e);
-            return exports.stopPropagation(e);
-        }
-
         var called = false;
         function onReleaseCapture(e) {
             eventHandler(e);
@@ -137,22 +132,17 @@ if (document.documentElement.setCapture) {
 }
 else {
     exports.capture = function(el, eventHandler, releaseCaptureHandler) {
-        function onMouseMove(e) {
-            eventHandler(e);
-            e.stopPropagation();
-        }
-
         function onMouseUp(e) {
             eventHandler && eventHandler(e);
             releaseCaptureHandler && releaseCaptureHandler(e);
 
-            document.removeEventListener("mousemove", onMouseMove, true);
+            document.removeEventListener("mousemove", eventHandler, true);
             document.removeEventListener("mouseup", onMouseUp, true);
 
             e.stopPropagation();
         }
 
-        document.addEventListener("mousemove", onMouseMove, true);
+        document.addEventListener("mousemove", eventHandler, true);
         document.addEventListener("mouseup", onMouseUp, true);
     };
 }