diff --git a/meshtastic/mesh.proto b/meshtastic/mesh.proto
index b10c780..35d7d62 100644
--- a/meshtastic/mesh.proto
+++ b/meshtastic/mesh.proto
@@ -1499,6 +1499,11 @@ message MeshPacket {
    * Indicates which transport mechanism this packet arrived over
    */
   TransportMechanism transport_mechanism = 21;
+
+  /*
+   * Contains the float value returned by lora.getFrequencyError()
+   */
+  float rx_frequency_error = 22;
 }
 
 /*