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-rw-r--r--src/effects.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/effects.js b/src/effects.js
index f3163ebbf..56141bb29 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -248,7 +248,7 @@ jQuery.each({
jQuery.extend({
speed: function( speed, easing, fn ) {
- var opt = speed && typeof speed === "object" ? speed : {
+ var opt = speed && typeof speed === "object" ? jQuery.extend({}, speed) : {
complete: fn || !fn && easing ||
jQuery.isFunction( speed ) && speed,
duration: speed,