diff --git a/core/src/main/java/com/github/lunatrius/core/entity/EntityHelper.java b/core/src/main/java/com/github/lunatrius/core/entity/EntityHelper.java
index f198c213..ecdd8286 100644
--- a/core/src/main/java/com/github/lunatrius/core/entity/EntityHelper.java
+++ b/core/src/main/java/com/github/lunatrius/core/entity/EntityHelper.java
@@ -21,7 +21,7 @@ public static int getItemCountInInventory(final IInventory inventory, final Item
         for (int slot = 0; slot < inventorySize; slot++) {
             final ItemStack itemStack = inventory.getStackInSlot(slot);
 
-            if (itemStack.getItem() == item && (itemDamage == WILDMARK || itemDamage == itemStack.getItemDamage())) {
+            if (itemStack != null && itemStack.getItem() == item && (itemDamage == WILDMARK || itemDamage == itemStack.getItemDamage())) {
                 count += itemStack.stackSize;
             }
         }