diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java
index 2d88eaebe..0fc98c658 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java
@@ -126,7 +126,7 @@ public class CleanroomServerProxy implements AbstractModInitializer.IEventProxy
 	@SubscribeEvent
 	public void serverChunkSaveEvent(ChunkDataEvent.Save event)
 	{
-		if (event.getWorld() instanceof WorldServer worldServer)
+		if (event.getWorld() instanceof WorldServer worldServer && event.getChunk().dirty)
 		{
 			MixinChunkMapCommon.onChunkSave(worldServer, event.getChunk());
 		}
diff --git a/common/src/main/resources/1_12_2.distanthorizons_at.cfg b/common/src/main/resources/1_12_2.distanthorizons_at.cfg
index 21faed46d..69f101178 100644
--- a/common/src/main/resources/1_12_2.distanthorizons_at.cfg
+++ b/common/src/main/resources/1_12_2.distanthorizons_at.cfg
@@ -2,4 +2,5 @@ public net.minecraft.client.renderer.EntityRenderer getFOVModifier(FZ)F
 public net.minecraft.client.renderer.ActiveRenderInfo MODELVIEW
 public net.minecraft.client.renderer.ActiveRenderInfo PROJECTION
 public net.minecraft.client.gui.GuiSlot amountScrolled
-public net.minecraft.world.gen.ChunkProviderServer droppedChunks
\ No newline at end of file
+public net.minecraft.world.gen.ChunkProviderServer droppedChunks
+public net.minecraft.world.chunk.Chunk dirty
\ No newline at end of file