diff --git a/lib/ice-coder.js b/lib/ice-coder.js
index f5edb28..8576c4d 100644
--- a/lib/ice-coder.js
+++ b/lib/ice-coder.js
@@ -1011,13 +1011,10 @@ var ICEcoder = {
 
 	// Alter array indicating which files have changed
 	redoChangedContent: function(evt) {
-		var cM, key;
+		var cM;
 		
 		cM = ICEcoder.getcMInstance();
-		key = evt.keyCode ? evt.keyCode : evt.which ? evt.which : evt.charCode;
-		ICEcoder.changedContent[ICEcoder.selectedTab-1] = 
-		top.ICEcoder.content.contentWindow['cM'+ICEcoder.cMInstances[ICEcoder.selectedTab-1]].historySize().undo > 0 
-		? 1 : 0;
+		ICEcoder.changedContent[ICEcoder.selectedTab-1] = cM.historySize().undo > 0 ? 1 : 0;
 		ICEcoder.redoTabHighlight(ICEcoder.selectedTab);
 	},