diff --git a/BlueMapCore/src/main/java/de/bluecolored/bluemap/core/mca/ChunkAnvil112.java b/BlueMapCore/src/main/java/de/bluecolored/bluemap/core/mca/ChunkAnvil112.java
index d300457e..8f1f315f 100644
--- a/BlueMapCore/src/main/java/de/bluecolored/bluemap/core/mca/ChunkAnvil112.java
+++ b/BlueMapCore/src/main/java/de/bluecolored/bluemap/core/mca/ChunkAnvil112.java
@@ -130,7 +130,7 @@ public BlockState getBlockState(Vector3i pos) {
 			int blockId = this.blocks[blockByteIndex] & 0xFF;
 			
 			if (this.add.length > 0) {
-				blockId = blockId & (getByteHalf(this.add[blockHalfByteIndex], largeHalf) << 8);
+				blockId = blockId | (getByteHalf(this.add[blockHalfByteIndex], largeHalf) << 8);
 			}
 			
 			int blockData = getByteHalf(this.data[blockHalfByteIndex], largeHalf);