diff --git a/src/protocols/RTTY/RTTY.cpp b/src/protocols/RTTY/RTTY.cpp
index ccd166cf..657f55f1 100644
--- a/src/protocols/RTTY/RTTY.cpp
+++ b/src/protocols/RTTY/RTTY.cpp
@@ -107,7 +107,9 @@ uint16_t ITA2String::getBits(char c) {
 
 RTTYClient::RTTYClient(PhysicalLayer* phy) {
   _phy = phy;
+  #if !defined(RADIOLIB_EXCLUDE_AFSK)
   _audio = nullptr;
+  #endif
 }
 
 #if !defined(RADIOLIB_EXCLUDE_AFSK)
@@ -161,9 +163,11 @@ int16_t RTTYClient::begin(float base, uint32_t shift, uint16_t rate, uint8_t enc
 
   // 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);
   }
+  #endif
 
   return(state);
 }
@@ -520,19 +524,21 @@ size_t RTTYClient::printFloat(double number, uint8_t digits)  {
 }
 
 int16_t RTTYClient::transmitDirect(uint32_t freq, uint32_t freqHz) {
+  #if !defined(RADIOLIB_EXCLUDE_AFSK)
   if(_audio != nullptr) {
     return(_audio->tone(freqHz));
-  } else {
-    return(_phy->transmitDirect(freq));
   }
+  #endif
+  return(_phy->transmitDirect(freq));
 }
 
 int16_t RTTYClient::standby() {
+  #if !defined(RADIOLIB_EXCLUDE_AFSK)
   if(_audio != nullptr) {
     return(_audio->noTone());
-  } else {
-    return(_phy->standby());
   }
+  #endif
+  return(_phy->standby());
 }
 
 #endif
diff --git a/src/protocols/RTTY/RTTY.h b/src/protocols/RTTY/RTTY.h
index a7bfbf73..baf89fe1 100644
--- a/src/protocols/RTTY/RTTY.h
+++ b/src/protocols/RTTY/RTTY.h
@@ -1,7 +1,10 @@
-#if !defined(_RADIOLIB_RTTY_H) && !defined(RADIOLIB_EXCLUDE_RTTY)
+#if !defined(_RADIOLIB_RTTY_H)
 #define _RADIOLIB_RTTY_H
 
 #include "../../TypeDef.h"
+
+#if !defined(RADIOLIB_EXCLUDE_RTTY)
+
 #include "../PhysicalLayer/PhysicalLayer.h"
 #include "../AFSK/AFSK.h"
 
@@ -159,8 +162,6 @@ class RTTYClient {
     PhysicalLayer* _phy;
     #if !defined(RADIOLIB_EXCLUDE_AFSK)
     AFSKClient* _audio;
-    #else
-    void* _audio;
     #endif
 
     uint8_t _encoding = ASCII;
@@ -181,3 +182,5 @@ class RTTYClient {
 };
 
 #endif
+
+#endif