diff --git a/NOTICE b/NOTICE
index 15ee7014be2..220db0838b1 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,2 +1,10 @@
 Druid - a distributed column store.
 Copyright 2012-2015 Metamarkets Group Inc.
+
+-------------------------------------------------------------------------------
+
+This product contains a modified version of Andrew Duffy's java-alphanum library
+  * LICENSE:
+    * https://github.com/amjjd/java-alphanum/blob/5c036e2e492cc7f3b7bcdebd46b8f9e2a87927e5/LICENSE.txt (Apache License, Version 2.0)
+  * HOMEPAGE:
+    * https://github.com/amjjd/java-alphanum
diff --git a/processing/src/main/java/io/druid/query/topn/AlphaNumericTopNMetricSpec.java b/processing/src/main/java/io/druid/query/topn/AlphaNumericTopNMetricSpec.java
index cc31fa0fe5f..45dee3403dd 100644
--- a/processing/src/main/java/io/druid/query/topn/AlphaNumericTopNMetricSpec.java
+++ b/processing/src/main/java/io/druid/query/topn/AlphaNumericTopNMetricSpec.java
@@ -33,7 +33,7 @@ public class AlphaNumericTopNMetricSpec extends LexicographicTopNMetricSpec
 
   protected static Comparator<String> comparator = new Comparator<String>()
   {
-    // This code is based on the Apache 2.0 licensed java-alphanum library (https://github.com/amjjd/java-alphanum)
+    // This code is based on https://github.com/amjjd/java-alphanum, see NOTICE file for more information
     public int compare(String str1, String str2)
     {
       int[] pos = {0, 0};