diff --git a/worldedit-core/src/main/java/com/sk89q/jnbt/NBTInputStream.java b/worldedit-core/src/main/java/com/sk89q/jnbt/NBTInputStream.java
index 78b9998a8..03c708844 100644
--- a/worldedit-core/src/main/java/com/sk89q/jnbt/NBTInputStream.java
+++ b/worldedit-core/src/main/java/com/sk89q/jnbt/NBTInputStream.java
@@ -21,12 +21,15 @@ package com.sk89q.jnbt;
 
 import com.boydti.fawe.jnbt.NBTStreamer;
 import com.boydti.fawe.object.RunnableVal2;
+import com.boydti.fawe.util.StringMan;
+
 import java.io.Closeable;
 import java.io.DataInput;
 import java.io.DataInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -407,7 +410,7 @@ public final class NBTInputStream implements Closeable {
                     int toRead = Math.min(length << 2, buf.length);
                     is.readFully(buf, 0, toRead);
                     for (int i = 0; i < toRead; i += 4, index++) {
-                        data[index] = ((buf[i] << 24) + (buf[i + 1] << 16) + (buf[i + 2] << 8) + (buf[i + 3]));
+                        data[index] = ((buf[i + 0] & 0xFF) << 24) + ((buf[i + 1] & 0xFF) << 16) + ((buf[i + 2] & 0xFF) << 8) + (buf[i + 3] & 0xFF);
                     }
                     length -= toRead;
                 }
@@ -424,7 +427,7 @@ public final class NBTInputStream implements Closeable {
                     int toRead = Math.min(length << 3, buf.length);
                     is.readFully(buf, 0, toRead);
                     for (int i = 0; i < toRead; i += 8, index++) {
-                        data[index] = (((long) buf[i] << 56) | ((long) buf[i + 1] << 48) | ((long) buf[i + 2] << 40) | ((long) buf[i + 3] << 32) | (buf[i + 4] << 24) | (buf[i + 5] << 16) | (buf[i + 6] << 8) | (buf[i + 7]));
+                        data[index] = (((long) buf[i] << 56) | ((long) (buf[i + 1] & 255) << 48) | ((long) (buf[i + 2] & 255) << 40) | ((long) (buf[i + 3] & 255) << 32) | ((long) (buf[i + 4] & 255) << 24) | ((buf[i + 5] & 255) << 16) | ((buf[i + 6] & 255) << 8) | (buf[i + 7] & 255));
                     }
                     length -= toRead;
                 }