diff --git a/src/engine/net/client/ClientMessagePump.java b/src/engine/net/client/ClientMessagePump.java
index f1121716..10d3a935 100644
--- a/src/engine/net/client/ClientMessagePump.java
+++ b/src/engine/net/client/ClientMessagePump.java
@@ -1470,7 +1470,9 @@ public class ClientMessagePump implements NetMsgHandler {
                                     int itemID = item.getItemBaseID();
                                     int meID = me.getItemBase().getUUID();
                                     if(itemID == meID){
-                                        int maxStack = Warehouse.maxResources.get(meID);
+                                        if(Warehouse.maxResources.isEmpty())
+                                            Warehouse.getMaxResources();
+                                        int maxStack = Warehouse.maxResources.get(itemID);
                                         if(maxStack > item.getNumOfItems() + 1){
                                             item.setNumOfItems(item.getNumOfItems() + 1);
                                             stacked = true;