diff --git a/src/protocols/AFSK/AFSK.cpp b/src/protocols/AFSK/AFSK.cpp
index 003c729d..bbf25b3a 100644
--- a/src/protocols/AFSK/AFSK.cpp
+++ b/src/protocols/AFSK/AFSK.cpp
@@ -1,12 +1,12 @@
 #include "AFSK.h"
 #if !defined(RADIOLIB_EXCLUDE_AFSK)
 
-AFSKClient::AFSKClient(PhysicalLayer* phy, uint32_t pin): _pin(pin) {
-  _phy = phy;
+AFSKClient::AFSKClient(PhysicalLayer* phy, uint32_t pin): outPin(pin) {
+  phyLayer = phy;
 }
 
 int16_t AFSKClient::begin() {
-  return(_phy->startDirect());
+  return(phyLayer->startDirect());
 }
 
 int16_t AFSKClient::tone(uint16_t freq, bool autoStart) {
@@ -15,23 +15,23 @@ int16_t AFSKClient::tone(uint16_t freq, bool autoStart) {
   }
 
   if(autoStart) {
-    int16_t state = _phy->transmitDirect();
+    int16_t state = phyLayer->transmitDirect();
     RADIOLIB_ASSERT(state);
   }
 
-  Module* mod = _phy->getMod();
-  mod->hal->tone(_pin, freq);
+  Module* mod = phyLayer->getMod();
+  mod->hal->tone(outPin, freq);
   return(RADIOLIB_ERR_NONE);
 }
 
 int16_t AFSKClient::noTone(bool keepOn) {
-  Module* mod = _phy->getMod();
-  mod->hal->noTone(_pin);
+  Module* mod = phyLayer->getMod();
+  mod->hal->noTone(outPin);
   if(keepOn) {
     return(0);
   }
 
-  return(_phy->standby());
+  return(phyLayer->standby());
 }
 
 #endif
diff --git a/src/protocols/AFSK/AFSK.h b/src/protocols/AFSK/AFSK.h
index bd125784..cdf6ebca 100644
--- a/src/protocols/AFSK/AFSK.h
+++ b/src/protocols/AFSK/AFSK.h
@@ -11,43 +11,34 @@
 
 /*!
   \class AFSKClient
-
   \brief Client for audio-based transmissions. Requires Arduino tone() function, and a module capable of direct mode transmission using DIO pins.
 */
 class AFSKClient  {
   public:
     /*!
       \brief Default contructor.
-
       \param phy Pointer to the wireless module providing PhysicalLayer communication.
-
       \param pin The pin that will be used for audio output.
     */
     AFSKClient(PhysicalLayer* phy, uint32_t pin);
 
     /*!
       \brief Initialization method.
-
       \returns \ref status_codes
     */
     int16_t begin();
 
     /*!
       \brief Start transmitting audio tone.
-
       \param freq Frequency of the tone in Hz.
-
       \param autoStart Whether to automatically enter transmission mode. Defaults to true.
-
       \returns \ref status_codes
     */
     int16_t tone(uint16_t freq, bool autoStart = true);
 
     /*!
       \brief Stops transmitting audio tone.
-
       \param freq Keep transmitter on - this may limit noise when switching transmitter on or off.
-
       \returns \ref status_codes
     */
     int16_t noTone(bool keepOn = false);
@@ -55,8 +46,8 @@ class AFSKClient  {
 #if !defined(RADIOLIB_GODMODE)
   private:
 #endif
-    PhysicalLayer* _phy;
-    uint32_t _pin;
+    PhysicalLayer* phyLayer;
+    uint32_t outPin;
 
     // allow specific classes access the private PhysicalLayer pointer
     friend class RTTYClient;