diff --git a/README.md b/README.md
index 918d8ec..f7dcfca 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ This API provides a suite of tools for transforming blocks and items in the game
 
 ## Features
 
-1. **Tile Entity Transformation**: Replace or modify Tile Entities in the game.
+1. **Tile Entity Transformation**: Replace or modify tile entities.
 2. **Block Replacement**: Replace normal blocks with another normal block.
 3. **ItemStack Replacement**: Modify or replace items.
 
@@ -12,7 +12,7 @@ This API provides a suite of tools for transforming blocks and items in the game
 
 ### 1. Tile Entity Transformation
 
-#### a. We provide the registered TE ID "GT_TileEntity_Ores" and a lambda function that takes in the NBTTagCompound for any matching tile entity in world and a World and returns a BlockInfo. This will replace all TE's with the ID "GT_TileEntity_Ores" with the block specified in the BlockInfo. The secondary parameter determines the damage value of the block.
+#### a. We provide the registered TE ID "GT_TileEntity_Ores" and a lambda function that takes in the NBTTagCompound for any matching tile entity in world and a World and returns a BlockInfo. This will replace all TE's with the ID "GT_TileEntity_Ores" with the block specified in the BlockInfo. The secondary parameter determines the damage value of the block. Returning null instead of a BlockInfo will leave the existing tile and block totally unchanged.
 
 ```java
 TileEntityReplacementManager.tileEntityTransformer("GT_TileEntity_Ores", (tag, world) -> {
diff --git a/src/main/java/com/gtnewhorizons/postea/utility/ChunkFixerUtility.java b/src/main/java/com/gtnewhorizons/postea/utility/ChunkFixerUtility.java
index 30d73cc..5149520 100644
--- a/src/main/java/com/gtnewhorizons/postea/utility/ChunkFixerUtility.java
+++ b/src/main/java/com/gtnewhorizons/postea/utility/ChunkFixerUtility.java
@@ -199,6 +199,11 @@ public class ChunkFixerUtility {
                 int z = tileEntity.getInteger("z");
 
                 BlockInfo blockInfo = transformationFunction.apply(tileEntity, world);
+                if (blockInfo == null) {
+                    // Do nothing.
+                    tileEntitiesCopy.appendTag(tileEntity);
+                    continue;
+                }
 
                 if (blockInfo.tileTransformer != null) {
                     tileEntitiesCopy.appendTag(blockInfo.tileTransformer.apply(tileEntity));
@@ -206,6 +211,7 @@ public class ChunkFixerUtility {
 
                 conversionInfo.add(new ConversionInfo(x, y, z, blockInfo));
             } else {
+                // Do nothing.
                 tileEntitiesCopy.appendTag(tileEntity);
             }
         }