diff --git a/src/protocols/AX25/AX25.cpp b/src/protocols/AX25/AX25.cpp
index edde12c4..d5bedc48 100644
--- a/src/protocols/AX25/AX25.cpp
+++ b/src/protocols/AX25/AX25.cpp
@@ -112,7 +112,9 @@ void AX25Frame::setSendSequence(uint8_t seqNumber) {
 
 AX25Client::AX25Client(PhysicalLayer* phy) {
   _phy = phy;
+  #if !defined(RADIOLIB_EXCLUDE_AFSK)
   _audio = nullptr;
+  #endif
 }
 
 #if !defined(RADIOLIB_EXCLUDE_AFSK)
@@ -140,12 +142,14 @@ int16_t AX25Client::begin(const char* srcCallsign, uint8_t srcSSID, uint8_t prea
 
   // set module frequency deviation to 0 if using FSK
   int16_t state = ERR_NONE;
+  #if !defined(RADIOLIB_EXCLUDE_AFSK)
   if(_audio == nullptr) {
     state = _phy->setFrequencyDeviation(0);
     RADIOLIB_ASSERT(state);
 
     state = _phy->setEncoding(0);
   }
+  #endif
   return(state);
 }
 
@@ -348,9 +352,8 @@ int16_t AX25Client::sendFrame(AX25Frame* frame) {
 
   // transmit
   int16_t state = ERR_NONE;
-  if(_audio == nullptr) {
-    state = _phy->transmit(stuffedFrameBuff, stuffedFrameBuffLen);
-  } else {
+  #if !defined(RADIOLIB_EXCLUDE_AFSK)
+  if(_audio != nullptr) {
     _phy->transmitDirect();
 
     // iterate over all bytes in the buffer
@@ -372,7 +375,13 @@ int16_t AX25Client::sendFrame(AX25Frame* frame) {
     }
 
     _audio->noTone();
+
+  } else {
+  #endif
+    state = _phy->transmit(stuffedFrameBuff, stuffedFrameBuffLen);
+  #if !defined(RADIOLIB_EXCLUDE_AFSK)
   }
+  #endif
 
   // deallocate memory
   #ifndef RADIOLIB_STATIC_ONLY
diff --git a/src/protocols/AX25/AX25.h b/src/protocols/AX25/AX25.h
index 7f7ed959..20df8d53 100644
--- a/src/protocols/AX25/AX25.h
+++ b/src/protocols/AX25/AX25.h
@@ -1,7 +1,10 @@
-#if !defined(_RADIOLIB_AX25_H) && !defined(RADIOLIB_EXCLUDE_AX25)
+#if !defined(_RADIOLIB_AX25_H)
 #define _RADIOLIB_AX25_H
 
 #include "../../TypeDef.h"
+
+#if !defined(RADIOLIB_EXCLUDE_AX25)
+
 #include "../PhysicalLayer/PhysicalLayer.h"
 #include "../AFSK/AFSK.h"
 
@@ -320,8 +323,6 @@ class AX25Client {
     PhysicalLayer* _phy;
     #if !defined(RADIOLIB_EXCLUDE_AFSK)
     AFSKClient* _audio;
-    #else
-    void* _audio;
     #endif
 
     char _srcCallsign[AX25_MAX_CALLSIGN_LEN + 1] = {0, 0, 0, 0, 0, 0, 0};
@@ -334,3 +335,5 @@ class AX25Client {
 };
 
 #endif
+
+#endif