diff --git a/js/msp/MSPHelper.js b/js/msp/MSPHelper.js
index 52d5431d..5af42399 100644
--- a/js/msp/MSPHelper.js
+++ b/js/msp/MSPHelper.js
@@ -2700,15 +2700,15 @@ var mspHelper = (function (gui) {
 
                 bitIndex = MSP.ledDirectionLetters.indexOf(led.directions[directionLetterIndex]);
                 if (bitIndex >= 0) {
-                    if(bitIndex < 2) {
-                        mask |= bit_set(mask, bitIndex + 2);
+                    if(bitIndex < 4) {
+                        mask |= bit_set(mask, bitIndex + 28);
                     } else {
-                        extra |= bit_set(exta, bitIndex - 2);
+                        extra |= bit_set(extra, bitIndex - 4);
                     }
                 }
             }
 
-            extra |= (0 << 4); // parameters
+            extra |= (0 << 2); // parameters
 
             buffer.push(specificByte(mask, 0));
             buffer.push(specificByte(mask, 1));