diff --git a/NOTICE b/NOTICE
index 8a71af072..278878bed 100644
--- a/NOTICE
+++ b/NOTICE
@@ -3,3 +3,6 @@ Copyright 2016 The Apache Software Foundation.
 
 This product includes software developed at The Apache Software Foundation (http://www.apache.org/).
 
+Based on source code originally developed by Yahoo (http://www.yahoo.com/).
+
+This product includes software developed at Yahoo (http://www.yahoo.com/). Licensed under the Apache v2.0 License.
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