diff --git a/core-java-modules/core-java-concurrency-collections-2/README.md b/core-java-modules/core-java-concurrency-collections-2/README.md
index 6ad6529efc..692c218395 100644
--- a/core-java-modules/core-java-concurrency-collections-2/README.md
+++ b/core-java-modules/core-java-concurrency-collections-2/README.md
@@ -2,4 +2,5 @@
 
 - [Introduction to Lock Striping](https://www.baeldung.com/java-lock-stripping)
 - [Guide to the Java TransferQueue](http://www.baeldung.com/java-transfer-queue)
+- [Java Concurrent HashSet Equivalent to ConcurrentHashMap](https://www.baeldung.com/java-concurrent-hashset-concurrenthashmap)
 - [[<-- Prev]](/core-java-modules/core-java-concurrency-collections)