diff --git a/src/main/java/com/pahimar/ee3/EquivalentExchange3.java b/src/main/java/com/pahimar/ee3/EquivalentExchange3.java
index 7e4360d3..3d88edd0 100644
--- a/src/main/java/com/pahimar/ee3/EquivalentExchange3.java
+++ b/src/main/java/com/pahimar/ee3/EquivalentExchange3.java
@@ -112,14 +112,14 @@ public class EquivalentExchange3
     }
 
     @EventHandler
-    public void postInit(FMLPostInitializationEvent event)
-    {
+    public void postInit(FMLPostInitializationEvent event) {
+
         Abilities.init();
     }
 
     @EventHandler
-    public void onServerStopping(FMLServerStoppingEvent event)
-    {
+    public void onServerStopping(FMLServerStoppingEvent event) {
+
         WorldEventHandler.hasInitilialized = false;
         EnergyValueRegistry.INSTANCE.save();
         TransmutationKnowledgeRegistry.getInstance().clear();
diff --git a/src/main/java/com/pahimar/ee3/tileentity/TileEntityCalcinator.java b/src/main/java/com/pahimar/ee3/tileentity/TileEntityCalcinator.java
index e5252056..f72d3337 100644
--- a/src/main/java/com/pahimar/ee3/tileentity/TileEntityCalcinator.java
+++ b/src/main/java/com/pahimar/ee3/tileentity/TileEntityCalcinator.java
@@ -52,12 +52,12 @@ public class TileEntityCalcinator extends TileEntityEE implements ISidedInventor
     @Override
     public int[] getAccessibleSlotsFromSide(int side)
     {
-        return side == ForgeDirection.DOWN.ordinal() ? new int[]{FUEL_INVENTORY_INDEX, OUTPUT_LEFT_INVENTORY_INDEX, OUTPUT_RIGHT_INVENTORY_INDEX} : new int[]{INPUT_INVENTORY_INDEX, OUTPUT_LEFT_INVENTORY_INDEX, OUTPUT_RIGHT_INVENTORY_INDEX};
+        return side == ForgeDirection.DOWN.ordinal() ? new int[]{FUEL_INVENTORY_INDEX, OUTPUT_LEFT_INVENTORY_INDEX, OUTPUT_RIGHT_INVENTORY_INDEX} : new int[]{FUEL_INVENTORY_INDEX, INPUT_INVENTORY_INDEX, OUTPUT_LEFT_INVENTORY_INDEX, OUTPUT_RIGHT_INVENTORY_INDEX};
     }
 
     @Override
-    public boolean canInsertItem(int slotIndex, ItemStack itemStack, int side)
-    {
+    public boolean canInsertItem(int slotIndex, ItemStack itemStack, int side) {
+
         return isItemValidForSlot(slotIndex, itemStack);
     }
 
@@ -185,8 +185,17 @@ public class TileEntityCalcinator extends TileEntityEE implements ISidedInventor
     }
 
     @Override
-    public boolean isItemValidForSlot(int slotIndex, ItemStack itemStack)
-    {
+    public boolean isItemValidForSlot(int slotIndex, ItemStack itemStack) {
+
+        if (itemStack != null) {
+            if (slotIndex == FUEL_INVENTORY_INDEX) {
+                return TileEntityFurnace.isItemFuel(itemStack);
+            }
+            else if (slotIndex == INPUT_INVENTORY_INDEX) {
+                return true;
+            }
+        }
+
         return false;
     }