diff --git a/src/gpio.cpp b/src/gpio.cpp
index 5a9e97d..2a99594 100644
--- a/src/gpio.cpp
+++ b/src/gpio.cpp
@@ -132,7 +132,7 @@ int clkgpio::SetMasterMultFrac(uint32_t Mult,uint32_t Frac)
 
 }
 
-int clkgpio::SetFrequency(int Frequency)
+int clkgpio::SetFrequency(double Frequency)
 {
 	if(ModulateFromMasterPLL)
 	{
@@ -160,6 +160,7 @@ int clkgpio::SetFrequency(int Frequency)
 
 }
 
+
 uint32_t clkgpio::GetMasterFrac(int Frequency)
 {
 	if(ModulateFromMasterPLL)
diff --git a/src/gpio.h b/src/gpio.h
index 820f9cd..1c39264 100644
--- a/src/gpio.h
+++ b/src/gpio.h
@@ -156,7 +156,7 @@ class clkgpio:public gpio
 	int SetPllNumber(int PllNo,int MashType);
 	uint64_t GetPllFrequency(int PllNo);
 	void print_clock_tree(void);
-	int SetFrequency(int Frequency); 
+	int SetFrequency(double Frequency); 
 	int SetClkDivFrac(uint32_t Div,uint32_t Frac);
 	void SetPhase(bool inversed);
 	void SetAdvancedPllMode(bool Advanced);