diff --git a/meshtastic/atak.proto b/meshtastic/atak.proto
index 83996a4..ccde335 100644
--- a/meshtastic/atak.proto
+++ b/meshtastic/atak.proto
@@ -60,7 +60,7 @@ message GeoChat {
   /*
    * Callsign of the recipient for the message
    */
-  optional string to_callsign = 2;
+  optional string to_callsign = 3;
 }
 
 /*