diff --git a/firmware/Pre-flight.md b/firmware/Pre-flight.md
index 741f7f0..183d1a6 100644
--- a/firmware/Pre-flight.md
+++ b/firmware/Pre-flight.md
@@ -18,6 +18,7 @@
 
 - In `aprs.h`
   - Set callsign and symbol
+  - Make sure `APRS_FLIGHT_PARAMS` is defined
 
 - In `main.c`
   - Set callsign
diff --git a/firmware/inc/aprs.h b/firmware/inc/aprs.h
index 5fb2c4f..391d92d 100644
--- a/firmware/inc/aprs.h
+++ b/firmware/inc/aprs.h
@@ -30,8 +30,8 @@
 /**
  * Reference APRS Protocol Spec  http://www.aprs.org/doc/APRS101.PDF
  */
-#define APRS_TESTING_PARAMS
-#ifdef APRS_TESTING_PARAMS
+#define APRS_FLIGHT_PARAMS
+#ifdef APRS_FLIGHT_PARAMS /* ----------- Parameters for flight */
 
 /**
  * This should be a full licensed callsign you own. Not mine plz k thx bai