diff --git a/dev/utils.js b/dev/utils.js
index 16afa3a9..9b904ab9 100644
--- a/dev/utils.js
+++ b/dev/utils.js
@@ -18,7 +18,7 @@ module.exports = {
 					} else if (/null/.test(match)) {
 						cls = "null";
 					}
-					return "<span class="" + cls + "">" + match + "</span>";
+					return "<span class=" + cls + ">" + match + "</span>";
 				});
 			}
 		}