diff --git a/libraries/README.md b/libraries/README.md
index 30f02e5c5a..7970c0e99e 100644
--- a/libraries/README.md
+++ b/libraries/README.md
@@ -25,7 +25,7 @@
 - [Apache Commons Collections OrderedMap](http://www.baeldung.com/apache-commons-ordered-map)
 - [A Guide to Apache Commons DbUtils](http://www.baeldung.com/apache-commons-dbutils)
 - [Introduction to Awaitility](http://www.baeldung.com/awaitlity-testing)
-
+- [Guide to the HyperLogLog Algorithm](http://www.baeldung.com/java-hyperloglog)
 
 The libraries module contains examples related to small libraries that are relatively easy to use and does not require any separate module of its own.