diff --git a/java-collections-maps-3/README.md b/java-collections-maps-3/README.md
index 87817331b5..75842c85a4 100644
--- a/java-collections-maps-3/README.md
+++ b/java-collections-maps-3/README.md
@@ -6,3 +6,4 @@
 - [Optimizing HashMap’s Performance](https://www.baeldung.com/java-hashmap-optimize-performance)
 - [Update the Value Associated With a Key in a HashMap](https://www.baeldung.com/java-hashmap-update-value-by-key)
 - [Java Map – keySet() vs. entrySet() vs. values() Methods](https://www.baeldung.com/java-map-entries-methods)
+- [Java IdentityHashMap Class and Its Use Cases](https://www.baeldung.com/java-identityhashmap)