diff --git a/core-java-modules/core-java-concurrency-advanced-5/src/main/java/com/baeldung/wait_synchronization/ConditionChecker.java b/core-java-modules/core-java-concurrency-advanced-5/src/main/java/com/baeldung/wait_synchronization/ConditionChecker.java
index dca36fe7cb..34e0a7522b 100644
--- a/core-java-modules/core-java-concurrency-advanced-5/src/main/java/com/baeldung/wait_synchronization/ConditionChecker.java
+++ b/core-java-modules/core-java-concurrency-advanced-5/src/main/java/com/baeldung/wait_synchronization/ConditionChecker.java
@@ -2,7 +2,7 @@ package com.baeldung.wait_synchronization;
 
 public class ConditionChecker {
 
-    private volatile Boolean jobIsDone;
+    private volatile boolean jobIsDone;
     private final Object lock = new Object();
 
     public void ensureCondition() {
@@ -21,4 +21,4 @@ public class ConditionChecker {
             lock.notify();
         }
     }
-}
\ No newline at end of file
+}