diff --git a/core/modules/utils/dom/dom.js b/core/modules/utils/dom/dom.js
index ef08ec369..1b5b6a31c 100644
--- a/core/modules/utils/dom/dom.js
+++ b/core/modules/utils/dom/dom.js
@@ -209,8 +209,8 @@ Get the computed styles applied to an element as an array of strings of individu
 exports.getComputedStyles = function(domNode) {
 	var textAreaStyles = window.getComputedStyle(domNode,null),
 		styleDefs = [];
-	$tw.utils.each(Object.keys(textAreaStyles),function(name) {
-		styleDefs.push(name + ": " + textAreaStyles[name] + ";");
+	$tw.utils.each(textAreaStyles,function(name,index) {
+		styleDefs.push(name + ": " + textAreaStyles.getPropertyValue(name) + ";");
 	});
 	return styleDefs;
 };