diff --git a/Minecraft.Client/Rendering/Chunk.cpp b/Minecraft.Client/Rendering/Chunk.cpp
index a91477615..cbf5bb4a3 100644
--- a/Minecraft.Client/Rendering/Chunk.cpp
+++ b/Minecraft.Client/Rendering/Chunk.cpp
@@ -20,7 +20,7 @@
 int Chunk::updates = 0;
 
 #ifdef _LARGE_WORLDS
-DWORD Chunk::tlsIdx = TlsAlloc();
+unsigned int Chunk::tlsIdx = TlsAlloc();
 
 void Chunk::CreateNewThreadStorage()
 {
diff --git a/Minecraft.Client/Rendering/Chunk.h b/Minecraft.Client/Rendering/Chunk.h
index 787fae4de..efcdfc914 100644
--- a/Minecraft.Client/Rendering/Chunk.h
+++ b/Minecraft.Client/Rendering/Chunk.h
@@ -32,7 +32,7 @@ private:
 #ifndef _LARGE_WORLDS
     static Tesselator *t;
 #else
-	static DWORD tlsIdx;
+	static unsigned int tlsIdx;
 public:
 	static void CreateNewThreadStorage();
 	static void ReleaseThreadStorage();