diff --git a/meshtastic/mesh.proto b/meshtastic/mesh.proto
index 6f5de04..af9b0c2 100644
--- a/meshtastic/mesh.proto
+++ b/meshtastic/mesh.proto
@@ -1075,7 +1075,7 @@ message Data {
   /*
    * XEdDSA signature for the payload
    */
-  optional bytes xeddsa_signature = 10;
+  bytes xeddsa_signature = 10;
 }
 
 /*