diff --git a/trick_source/java/src/trick/simcontrol/SimControlApplication.java b/trick_source/java/src/trick/simcontrol/SimControlApplication.java
index 349a1d17..7c6d059e 100644
--- a/trick_source/java/src/trick/simcontrol/SimControlApplication.java
+++ b/trick_source/java/src/trick/simcontrol/SimControlApplication.java
@@ -1411,7 +1411,7 @@ public class SimControlApplication extends TrickApplication implements PropertyC
     	private void retrieveHostPort() {
     	    try {
     	    	multicastSocket = new MulticastSocket(9265);
-    	        InetAddress group = InetAddress.getByName("224.3.14.15");
+    	        InetAddress group = InetAddress.getByName("239.3.14.15");
     	        multicastSocket.joinGroup(group);
     	         
     	        byte[] buffer = new byte[1024];
diff --git a/trick_source/java/src/trick/sniffer/SimulationSniffer.java b/trick_source/java/src/trick/sniffer/SimulationSniffer.java
index 22f38fc7..77605d17 100644
--- a/trick_source/java/src/trick/sniffer/SimulationSniffer.java
+++ b/trick_source/java/src/trick/sniffer/SimulationSniffer.java
@@ -63,7 +63,7 @@ public class SimulationSniffer extends Thread {
     public void run() {
         try {
             multicastSocket = new MulticastSocket(9265) {{
-                joinGroup(InetAddress.getByName("224.3.14.15"));
+                joinGroup(InetAddress.getByName("239.3.14.15"));
             }};
             byte[] buffer = new byte[4096];
             DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
diff --git a/trick_source/sim_services/VariableServer/VariableServerListenThread.cpp b/trick_source/sim_services/VariableServer/VariableServerListenThread.cpp
index d5170841..f3137aaf 100644
--- a/trick_source/sim_services/VariableServer/VariableServerListenThread.cpp
+++ b/trick_source/sim_services/VariableServer/VariableServerListenThread.cpp
@@ -156,7 +156,7 @@ void * Trick::VariableServerListenThread::thread_body() {
         /* Set up destination address */
         memset(&mcast_addr, 0, sizeof(mcast_addr));
         mcast_addr.sin_family = AF_INET;
-        mcast_addr.sin_addr.s_addr = inet_addr("224.3.14.15");
+        mcast_addr.sin_addr.s_addr = inet_addr("239.3.14.15");
         mcast_addr.sin_port = htons((uint16_t) 9265);
     }