diff --git a/lib/ice-coder.js b/lib/ice-coder.js
index 2beab2d..959f573 100644
--- a/lib/ice-coder.js
+++ b/lib/ice-coder.js
@@ -1388,9 +1388,9 @@ var ICEcoder = {
 			top.document.getElementById('fileMenu').style.display='none';
 		}
 
-		cMCSS = ICEcoder.content.contentWindow.document.styleSheets[2];
+		cMCSS = ICEcoder.content.contentWindow.document.styleSheets[3];
 		strCSS = cMCSS.rules ? 'rules' : 'cssRules';
-		cMCSS[strCSS][4].style['content'] = visibleTabs ? '"\\21e5"' : '" "';
+		cMCSS[strCSS][5].style['content'] = visibleTabs ? '"\\21e5"' : '" "';
 		cMCSS[strCSS][2].style.cssText = "background: " + activeLineBG + " !important";
 
 		top.ICEcoder.lineWrapping = lineWrapping;