diff --git a/afsk/send_afsk.c b/afsk/send_afsk.c
index 248b580f..5dceea58 100644
--- a/afsk/send_afsk.c
+++ b/afsk/send_afsk.c
@@ -1,5 +1,5 @@
 /*
- *  A sample application transmitting 1k2 AFSK in X.25 format
+ *  transmits a frame of AO-7 telemetry as 1k2 AFSK in X.25 format
  *
  *  Portions Copyright (C) 2018 Jonathan Brandenburg
  *