diff --git a/mappings/net/minecraft/server/world/ServerChunkManager.mapping b/mappings/net/minecraft/server/world/ServerChunkManager.mapping
index 2a51d17e9e..aa059e4628 100644
--- a/mappings/net/minecraft/server/world/ServerChunkManager.mapping
+++ b/mappings/net/minecraft/server/world/ServerChunkManager.mapping
@@ -40,4 +40,4 @@ CLASS ut net/minecraft/server/world/ServerChunkManager
 	METHOD g getLoadedChunkCount ()I
 	METHOD h getPersistentStateManager ()Lcjq;
 	METHOD k update ()Z
-	METHOD l doMobSpawning ()V
+	METHOD l tickChunks ()V
diff --git a/mappings/net/minecraft/server/world/ServerWorld.mapping b/mappings/net/minecraft/server/world/ServerWorld.mapping
index ba024d3bff..b0439c0142 100644
--- a/mappings/net/minecraft/server/world/ServerWorld.mapping
+++ b/mappings/net/minecraft/server/world/ServerWorld.mapping
@@ -30,6 +30,9 @@ CLASS uv net/minecraft/server/world/ServerWorld
 	METHOD a addLightning (Lapp;)V
 	METHOD a init (Lbdj;)V
 		ARG 1 levelInfo
+	METHOD a tickChunk (Lbte;I)V
+		ARG 1 chunk
+		ARG 2 randomTickSpeed
 	METHOD a getEntity (Ljava/util/UUID;)Lahm;
 	METHOD a save (Lzi;ZZ)V
 		ARG 1 progressListener