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-rw-r--r--ui/ui.position.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/ui/ui.position.js b/ui/ui.position.js
index b0c4bc871..366014195 100644
--- a/ui/ui.position.js
+++ b/ui/ui.position.js
@@ -51,7 +51,7 @@ $.fn.position = function(options) {
// force my and at to have valid horizontal and veritcal positions
// if a value is missing or invalid, it will be converted to center
$.each(['my', 'at'], function() {
- var pos = ( options[this] || horizontalDefault ).split(' ');
+ var pos = ( options[this] || "" ).split(' ');
pos = pos.length == 1
? horizontalPositions.test(pos[0])
? pos.concat([verticalDefault])