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-rw-r--r--ui/ui.core.js2
1 files changed, 2 insertions, 0 deletions
diff --git a/ui/ui.core.js b/ui/ui.core.js
index 12ee73737..ddeb7d5e2 100644
--- a/ui/ui.core.js
+++ b/ui/ui.core.js
@@ -423,6 +423,8 @@ $.ui.mouse = {
_mouseDown: function(event) {
// don't let more than one widget handle mouseStart
+ // TODO: figure out why we have to use originalEvent
+ event.originalEvent = event.originalEvent || {};
if (event.originalEvent.mouseHandled) { return; }
// we may have missed mouseup (out of window)