diff --git a/src/resources/objects/group/GroupObject.java b/src/resources/objects/group/GroupObject.java
index fc97006eb..11f3f7a90 100644
--- a/src/resources/objects/group/GroupObject.java
+++ b/src/resources/objects/group/GroupObject.java
@@ -41,8 +41,8 @@ import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.Serializable;
 import java.nio.ByteBuffer;
-import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Map;
 
@@ -194,9 +194,9 @@ public class GroupObject extends SWGObject { // Extends INTO or TANO?
 		return members;
 	}
 	
-	public ArrayList<CreatureObject> getGroupMemberObjects() {
+	public HashSet<CreatureObject> getGroupMemberObjects() {
 		
-		ArrayList<CreatureObject> memberObjects = new ArrayList<>();
+		HashSet<CreatureObject> memberObjects = new HashSet<>();
 		
 		synchronized (groupMembers) {
 			
diff --git a/src/services/group/GroupService.java b/src/services/group/GroupService.java
index 76523702a..b4793b7fb 100644
--- a/src/services/group/GroupService.java
+++ b/src/services/group/GroupService.java
@@ -50,6 +50,7 @@ import utilities.IntentFactory;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Timer;
@@ -421,7 +422,7 @@ public class GroupService extends Service {
 
 	private void sendGroupSystemMessage(GroupObject group, String id) {
 		
-		ArrayList<CreatureObject> members = group.getGroupMemberObjects();
+		HashSet<CreatureObject> members = group.getGroupMemberObjects();
 		
 		for (CreatureObject member : members) {
 			new ChatBroadcastIntent(member.getOwner(), new ProsePackage("group", id)).broadcast();