diff --git a/core-java-modules/core-java-lang-5/README.md b/core-java-modules/core-java-lang-5/README.md
index b8deff199e..5ff3e83d2c 100644
--- a/core-java-modules/core-java-lang-5/README.md
+++ b/core-java-modules/core-java-lang-5/README.md
@@ -14,3 +14,4 @@ This module contains articles about core features in the Java language
 - [Convert Between int and char in Java](https://www.baeldung.com/java-convert-int-char)
 - [Converting a Number from One Base to Another in Java](https://www.baeldung.com/java-converting-a-number-from-one-base-to-another)
 - [Check if Command-Line Arguments Are Null in Java](https://www.baeldung.com/java-check-command-line-args)
+- [Determine if a Class Implements an Interface in Java](https://www.baeldung.com/java-check-class-implements-interface)