diff --git a/meshtastic/mesh.proto b/meshtastic/mesh.proto
index 3d97750b..61e1180e 100644
--- a/meshtastic/mesh.proto
+++ b/meshtastic/mesh.proto
@@ -825,6 +825,11 @@ enum HardwareModel {
    */
   RAK3401 = 117;
 
+  /*
+   * RAK6421 Hat+
+   */
+  RAK6421 = 118;
+  
   /*
    * ------------------------------------------------------------------------------------------------------------------------------------------
    * Reserved ID For developing private Ports. These will show up in live traffic sparsely, so we can use a high number. Keep it within 8 bits.