diff --git a/src/jtagInterface.hpp b/src/jtagInterface.hpp
index ff93d1f..4278daa 100644
--- a/src/jtagInterface.hpp
+++ b/src/jtagInterface.hpp
@@ -33,6 +33,7 @@ class JtagInterface {
 	virtual ~JtagInterface() {}
 
 	virtual int setClkFreq(uint32_t clkHZ) = 0;
+	virtual uint32_t getClkFreq() { return 0;}
 
 	/*!
 	 * \brief flush TMS internal buffer (ie. transmit to converter)
diff --git a/src/usbBlaster.cpp b/src/usbBlaster.cpp
index 76cf09a..c5d364c 100644
--- a/src/usbBlaster.cpp
+++ b/src/usbBlaster.cpp
@@ -96,6 +96,11 @@ int UsbBlaster::setClkFreq(uint32_t clkHZ)
 	return ll_driver->setClkFreq(clkHZ);
 }
 
+uint32_t UsbBlaster::getClkFreq()
+{
+	return ll_driver->getClkFreq();
+}
+
 int UsbBlaster::writeTMS(uint8_t *tms, int len, bool flush_buffer)
 {
 	int ret;
@@ -386,6 +391,11 @@ int UsbBlasterI::setClkFreq(uint32_t clkHZ)
 	return 1;
 }
 
+uint32_t UsbBlasterI::getClkFreq()
+{
+	return 24e6;
+}
+
 int UsbBlasterI::write(uint8_t *wr_buf, int wr_len,
 				uint8_t *rd_buf, int rd_len)
 {
@@ -454,6 +464,11 @@ int UsbBlasterII::setClkFreq(uint32_t clkHZ)
 	return 1;
 }
 
+uint32_t UsbBlasterII::getClkFreq()
+{
+	return 24e6;
+}
+
 int UsbBlasterII::write(uint8_t *wr_buf, int wr_len,
 				uint8_t *rd_buf, int rd_len)
 {
diff --git a/src/usbBlaster.hpp b/src/usbBlaster.hpp
index 689aa91..d82a32a 100644
--- a/src/usbBlaster.hpp
+++ b/src/usbBlaster.hpp
@@ -38,6 +38,7 @@ class UsbBlaster_ll {
 	public:
 		virtual ~UsbBlaster_ll() {}
 		virtual int setClkFreq(uint32_t clkHZ) = 0;
+		virtual uint32_t getClkFreq() = 0;
 		virtual int write(uint8_t *wr_buf, int wr_len,
 			uint8_t *rd_buf, int rd_len) = 0;
 };
@@ -56,6 +57,7 @@ class UsbBlaster : public JtagInterface {
 	virtual ~UsbBlaster();
 
 	int setClkFreq(uint32_t clkHZ) override;
+	uint32_t getClkFreq() override;
 
 	/*!
 	 * \brief drive TMS to move in JTAG state machine
@@ -117,6 +119,7 @@ class UsbBlasterI: public UsbBlaster_ll {
 		virtual ~UsbBlasterI();
 
 		int setClkFreq(uint32_t clkHZ) override;
+		uint32_t getClkFreq() override;
 		int write(uint8_t *wr_buf, int wr_len,
 				uint8_t *rd_buf, int rd_len) override;
 	private:
@@ -139,6 +142,7 @@ class UsbBlasterII: public UsbBlaster_ll {
 		virtual ~UsbBlasterII();
 
 		int setClkFreq(uint32_t clkHZ) override;
+		uint32_t getClkFreq() override;
 		int write(uint8_t *wr_buf, int wr_len,
 				uint8_t *rd_buf, int rd_len) override;
 	private: