diff --git a/src/config.h b/src/config.h
index ea16cc0..3676219 100644
--- a/src/config.h
+++ b/src/config.h
@@ -11,7 +11,7 @@
  */
 
 // Set the tracker amateur radio call sign here
-#define CALLSIGN "MYCALL"
+#define CALLSIGN "SP9UNB"
 
 // Disabling LEDs will save power
 // Red LED: Lit during initialization and transmit.