diff --git a/plugins/LaserUE.java b/plugins/LaserUE.java
index 30a6619..e733781 100644
--- a/plugins/LaserUE.java
+++ b/plugins/LaserUE.java
@@ -28,6 +28,7 @@ public class LaserUE extends SerialPortDevice{
     protected void onByte(int rx) {
         if (rx<0){
             rx+=256;
+            rx|=BIT7;
         }
         System.out.println(rx);        
         int index = ((rx&BIT7) > 0) ? 2 : (((rx&BIT6) > 0) ? 1 : 0);