diff --git a/lib/log4js.js b/lib/log4js.js
index 453a62c..bd5ebda 100644
--- a/lib/log4js.js
+++ b/lib/log4js.js
@@ -166,7 +166,7 @@ function configureLevels(levels) {
   if (levels) {
     for (var category in levels) {
       if (levels.hasOwnProperty(category)) {
-        if(category === "all") {
+        if(category === ALL_CATEGORIES) {
           setGlobalLogLevel(levels[category]);
         }
         getLogger(category).setLevel(levels[category]);