diff --git a/java/src/com.zeroc.ice/src/main/java/com/zeroc/Ice/Communicator.java b/java/src/com.zeroc.ice/src/main/java/com/zeroc/Ice/Communicator.java
index 2b174b6511e..a0db05d8396 100644
--- a/java/src/com.zeroc.ice/src/main/java/com/zeroc/Ice/Communicator.java
+++ b/java/src/com.zeroc.ice/src/main/java/com/zeroc/Ice/Communicator.java
@@ -36,7 +36,7 @@ public final class Communicator implements AutoCloseable {
      */
     public Communicator(InitializationData initData) {
         _instance = new Instance();
-        _instance.initialize(this, initData);
+        _instance.initialize(this, initData.clone());
 
         try {
             _instance.finishSetup(this);