diff --git a/src/main/java/org/ultramine/server/chunk/ChunkHash.java b/src/main/java/org/ultramine/server/chunk/ChunkHash.java
index 9c58da1..26cd92d 100644
--- a/src/main/java/org/ultramine/server/chunk/ChunkHash.java
+++ b/src/main/java/org/ultramine/server/chunk/ChunkHash.java
@@ -23,7 +23,7 @@
 	
 	public static long worldChunkToKey(int dim, int x, int z)
 	{
-		return dim << 32 | (long)(x & 0xffff) << 16 | (z & 0xffff);
+		return (long)dim << 32 | (long)(x & 0xffff) << 16 | (z & 0xffff);
 	}
 	
 	public static long blockCoordToHash(int x, int y, int z)
diff --git a/src/main/java/org/ultramine/server/chunk/ChunkProfiler.java b/src/main/java/org/ultramine/server/chunk/ChunkProfiler.java
index f977edf..c4d1d47 100644
--- a/src/main/java/org/ultramine/server/chunk/ChunkProfiler.java
+++ b/src/main/java/org/ultramine/server/chunk/ChunkProfiler.java
@@ -95,7 +95,7 @@
 		
 		public int getDimension()
 		{
-			return (int)(key >>> 32);
+			return (int)(key >> 32);
 		}
 		
 		public int getChunkX()
@@ -191,7 +191,7 @@
 		{
 			if(isChunkDebugEnabled)
 			{
-				curChunk = dim << 32 | key;
+				curChunk = (long)dim << 32 | key & 0xFFFFFFFFL;
 				curChunkStart = System.nanoTime();
 			}
 		}