diff --git a/src/main/java/mekanism/api/util/StackUtils.java b/src/main/java/mekanism/api/util/StackUtils.java
index d15c4fb1d..0393b3930 100644
--- a/src/main/java/mekanism/api/util/StackUtils.java
+++ b/src/main/java/mekanism/api/util/StackUtils.java
@@ -242,6 +242,11 @@ public final class StackUtils
 
 	public static int hashItemStack(ItemStack stack)
 	{
+		if(stack == null)
+		{
+			return -1;
+		}
+		
 		String name = stack.getItemDamage() == OreDictionary.WILDCARD_VALUE ? stack.getItem().getUnlocalizedName() : stack.getItem().getUnlocalizedName(stack);
 		return name.hashCode() << 8 | stack.getItemDamage();
 	}