diff --git a/build-data/reobf-mappings-patch.tiny b/build-data/reobf-mappings-patch.tiny
index 7557cdc29c..318872ceb8 100644
--- a/build-data/reobf-mappings-patch.tiny
+++ b/build-data/reobf-mappings-patch.tiny
@@ -16,6 +16,9 @@ tiny	2	0	mojang+yarn	spigot
 c	net/minecraft/server/level/ServerLevel	net/minecraft/server/level/WorldServer
 	f	Lnet/minecraft/world/level/storage/PrimaryLevelData;	serverLevelData	E
 
+c	net/minecraft/world/level/chunk/LevelChunk	net/minecraft/world/level/chunk/Chunk
+	f	Lnet/minecraft/server/level/ServerLevel;	level	i
+
 # unknown issue
 c	net/minecraft/core/RegistryAccess	net/minecraft/core/IRegistryCustom
 	m	(Lnet/minecraft/resources/ResourceKey;)Lnet/minecraft/core/Registry;	registryOrThrow	d