diff --git a/NullModem.h b/NullModem.h
index 2698f47f6..a7ec68f4c 100644
--- a/NullModem.h
+++ b/NullModem.h
@@ -32,8 +32,8 @@ class CNullModem : public CModem {
 
 	virtual void setSerialParams(const std::string& protocol, unsigned int address){};
 	virtual void setRFParams(unsigned int rxFrequency, int rxOffset, unsigned int txFrequency, int txOffset, int txDCOffset, int rxDCOffset, float rfLevel, unsigned int pocsagFrequency){};
-	virtual void setModeParams(bool dstarEnabled, bool dmrEnabled, bool ysfEnabled, bool p25Enabled, bool nxdnEnabled, bool pocsagEnabled){};
-	virtual void setLevels(float rxLevel, float cwIdTXLevel, float dstarTXLevel, float dmrTXLevel, float ysfTXLevel, float p25TXLevel, float nxdnTXLevel, float pocsagLevel){};
+	virtual void setModeParams(bool dstarEnabled, bool dmrEnabled, bool ysfEnabled, bool p25Enabled, bool nxdnEnabled, bool pocsagEnabled, bool fmEnabled){};
+	virtual void setLevels(float rxLevel, float cwIdTXLevel, float dstarTXLevel, float dmrTXLevel, float ysfTXLevel, float p25TXLevel, float nxdnTXLevel, float pocsagLevel, float fmTXLevel){};
 	virtual void setDMRParams(unsigned int colorCode){};
 	virtual void setYSFParams(bool loDev, unsigned int txHang){};
 	virtual void setTransparentDataParams(unsigned int sendFrameType){};