diff --git a/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java b/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java
index bb3e0223f3..bc8177837c 100644
--- a/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java
+++ b/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDPositiveLongGenerator.java
@@ -22,7 +22,7 @@ public class UUIDPositiveLongGenerator {
 
     public long combineByteBuffer(){
         UUID uuid = UUID.randomUUID();
-        ByteBuffer bb = ByteBuffer.wrap(new byte[64]);
+        ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
         bb.putLong(uuid.getMostSignificantBits());
         bb.putLong(uuid.getLeastSignificantBits());
         bb.rewind();