diff --git a/src/encoders/motion/centroid-accel-velocity.ts b/src/encoders/motion/centroid-accel-velocity.ts
index c98cfa4..aedd91f 100644
--- a/src/encoders/motion/centroid-accel-velocity.ts
+++ b/src/encoders/motion/centroid-accel-velocity.ts
@@ -14,7 +14,7 @@ export default (
   const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
 
   let dataOffset = 0;
-  view.setUint8(dataOffset, 0x02);
+  view.setUint8(dataOffset, 0x20);
   dataOffset += 1;
   view.setUint16(dataOffset, bytes.byteLength, isLittleEndian);
   dataOffset += 2;
diff --git a/src/encoders/motion/tracked-point-accel-velocity.ts b/src/encoders/motion/tracked-point-accel-velocity.ts
index 815c802..c8e4e0a 100644
--- a/src/encoders/motion/tracked-point-accel-velocity.ts
+++ b/src/encoders/motion/tracked-point-accel-velocity.ts
@@ -15,7 +15,7 @@ export default (
   const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
 
   let dataOffset = 0;
-  view.setUint8(dataOffset, 0x02);
+  view.setUint8(dataOffset, 0x21);
   dataOffset += 1;
   view.setUint16(dataOffset, bytes.byteLength, isLittleEndian);
   dataOffset += 2;