diff --git a/Software/VNA_embedded/Application/Drivers/Si5351C.cpp b/Software/VNA_embedded/Application/Drivers/Si5351C.cpp
index 380465e..d31c92c 100644
--- a/Software/VNA_embedded/Application/Drivers/Si5351C.cpp
+++ b/Software/VNA_embedded/Application/Drivers/Si5351C.cpp
@@ -75,7 +75,7 @@ bool Si5351C::SetPLL(PLL pll, uint32_t frequency, PLLSource src, bool exactFrequ
 	return WritePLLConfig(c, pll);
 }
 
-bool Si5351C::SetCLK(uint8_t clknum, uint32_t frequency, PLL source, DriveStrength strength, uint32_t PLLFreqOverride, bool exactFrequency) {
+bool Si5351C::SetCLK(uint8_t clknum, uint32_t frequency, PLL source, DriveStrength strength, bool exactFrequency) {
 	ClkConfig c;
 	c.DivideBy4 = false;
 	c.IntegerMode = false;
@@ -85,7 +85,7 @@ bool Si5351C::SetCLK(uint8_t clknum, uint32_t frequency, PLL source, DriveStreng
 	c.source = source;
 	c.strength = strength;
 
-	uint32_t pllFreq = PLLFreqOverride > 0 ? PLLFreqOverride : FreqPLL[(int) source];
+	uint32_t pllFreq = FreqPLL[(int) source];
 	if (clknum > 5) {
 		// outputs 6 and 7 are integer dividers only
 		uint32_t div = pllFreq / frequency;
diff --git a/Software/VNA_embedded/Application/Drivers/Si5351C.hpp b/Software/VNA_embedded/Application/Drivers/Si5351C.hpp
index a175b34..3f800b8 100644
--- a/Software/VNA_embedded/Application/Drivers/Si5351C.hpp
+++ b/Software/VNA_embedded/Application/Drivers/Si5351C.hpp
@@ -32,7 +32,7 @@ public:
 	bool Init(uint32_t clkin_freq = 0);
 	bool ConfigureCLKIn(uint32_t clkin_freq);
 	bool SetPLL(PLL pll, uint32_t frequency, PLLSource src, bool exactFrequency=true);
-	bool SetCLK(uint8_t clknum, uint32_t frequency, PLL source, DriveStrength strength = DriveStrength::mA2, uint32_t PLLFreqOverride = 0, bool exactFrequency=true);
+	bool SetCLK(uint8_t clknum, uint32_t frequency, PLL source, DriveStrength strength = DriveStrength::mA2, bool exactFrequency=true);
 	bool SetBypass(uint8_t clknum, PLLSource source, DriveStrength strength = DriveStrength::mA2);
 	bool SetCLKtoXTAL(uint8_t clknum);
 	bool SetCLKToCLKIN(uint8_t clknum);