diff --git a/index.html b/index.html
index 5e6c606..1bf2baf 100755
--- a/index.html
+++ b/index.html
@@ -261,12 +261,12 @@ console.log "oO08 iIlL1 g9qCGQ ~-+=>";
 
 function updateGutters(cm) {
 	var gutters = cm.display.gutters,
-		  specs = cm.options.gutters;
+		__specs = cm.options.gutters;
 
 	removeChildren(gutters);
 
 	for (var i = 0; i < specs.length; ++i) {
-		var gutterClass = specs[i];
+		var gutterClass = __specs[i];
 		var gElt = gutters.appendChild(
 			elt(
 				"div",