--- ../src_base/minecraft_server/net/minecraft/src/ContainerFurnace.java	0000-00-00 00:00:00.000000000 -0000
+++ ../src_work/minecraft_server/net/minecraft/src/ContainerFurnace.java	0000-00-00 00:00:00.000000000 -0000
@@ -98,7 +98,7 @@
             }
             else if (par1 != 1 && par1 != 0)
             {
-                if (FurnaceRecipes.smelting().getSmeltingResult(var4.getItem().shiftedIndex) != null)
+                if (FurnaceRecipes.smelting().getSmeltingResult(var4) != null)
                 {
                     if (!this.mergeItemStack(var4, 0, 1, false))
                     {