diff --git a/src/protocols/AFSK/AFSK.h b/src/protocols/AFSK/AFSK.h
index ea48630e..d4ca58d6 100644
--- a/src/protocols/AFSK/AFSK.h
+++ b/src/protocols/AFSK/AFSK.h
@@ -44,7 +44,7 @@ class AFSKClient  {
 
     /*!
       \brief Stops transmitting audio tone.
-      \param freq Keep transmitter on - this may limit noise when switching transmitter on or off.
+      \param keepOn Keep transmitter on - this may limit noise when switching transmitter on or off.
       \returns \ref status_codes
     */
     int16_t noTone(bool keepOn = false);