diff --git a/scripts/src/jquery.animate-enhanced.js b/scripts/src/jquery.animate-enhanced.js
index 90229ef..c519993 100644
--- a/scripts/src/jquery.animate-enhanced.js
+++ b/scripts/src/jquery.animate-enhanced.js
@@ -667,6 +667,12 @@ Changelog:
 			bypassPlugin = (typeof prop['avoidCSSTransitions'] !== 'undefined') ? prop['avoidCSSTransitions'] : pluginDisabledDefault;
 
 		if (bypassPlugin === true || !cssTransitionsSupported || _isEmptyObject(prop) || _isBoxShortcut(prop) || optall.duration <= 0 || optall.step) {
+			//fallback for special easing that use CUBIC_BEZIER.
+			if($.easing && !$.easing.hasOwnProperty(arguments[2])) {
+				if((arguments[2] !== 'linear' && arguments[2] !== 'swing') ){
+					arguments[2] = 'linear';
+				}
+			}
 			return originalAnimateMethod.apply(this, arguments);
 		}