diff --git a/firmware/controllers/engine_cycle/knock_controller.cpp b/firmware/controllers/engine_cycle/knock_controller.cpp
index aa9df359be..ab766aaa44 100644
--- a/firmware/controllers/engine_cycle/knock_controller.cpp
+++ b/firmware/controllers/engine_cycle/knock_controller.cpp
@@ -44,7 +44,7 @@ int getCylinderKnockBank(uint8_t cylinderNumber) {
 	}
 }
 
-void KnockControllerBase::onKnockSenseCompleted(uint8_t cylinderNumber, float dbv, float frequency, efitick_t lastKnockTime) {
+void KnockControllerBase::onKnockSenseCompleted(uint8_t cylinderNumber, float dbv, efitick_t lastKnockTime) {
 	bool isKnock = dbv > m_knockThreshold;
 
 	// Per-cylinder peak detector
@@ -53,7 +53,6 @@ void KnockControllerBase::onKnockSenseCompleted(uint8_t cylinderNumber, float db
 
 	// All-cylinders peak detector
 	m_knockLevel = allCylinderPeakDetector.detect(dbv, lastKnockTime);
-	m_knockFrequency = frequency;
 
 	if (isKnock) {
 		m_knockCount++;
diff --git a/firmware/controllers/engine_cycle/knock_controller.txt b/firmware/controllers/engine_cycle/knock_controller.txt
index 6cab883e19..e1a6145675 100644
--- a/firmware/controllers/engine_cycle/knock_controller.txt
+++ b/firmware/controllers/engine_cycle/knock_controller.txt
@@ -7,7 +7,6 @@ struct_no_prefix knock_controller_s
 	uint32_t m_knockCount;@@GAUGE_NAME_KNOCK_COUNTER@@;"",1, 0, 0, 0, 0
 	float m_maximumRetard;Knock: Max retard
 
-  uint32_t m_knockFrequency;@@GAUGE_NAME_KNOCK_FREQ@@;"Hz", 1, 0, 0, 0, 2
 	uint32_t[16 iterate] m_knockSpectrum;Knock: SpectrumData;"compressed data",1, 0, 0, 0, 0
 	uint16_t m_knockSpectrumChannelCyl;Knock: ChannelAndCylNumber;"compressed N + N", 1, 0, 0, 0, 0
 	uint16_t m_knockFrequencyStart;Knock: Start Freq;"Hz", 1, 0, 0, 0, 0
diff --git a/firmware/controllers/engine_cycle/knock_logic.h b/firmware/controllers/engine_cycle/knock_logic.h
index e6f9750ee6..f1eedfb869 100644
--- a/firmware/controllers/engine_cycle/knock_logic.h
+++ b/firmware/controllers/engine_cycle/knock_logic.h
@@ -24,7 +24,7 @@ public:
 	void onFastCallback() override;
 
 	// onKnockSenseCompleted is the callback from the knock sense driver to report a sensed knock level
-	void onKnockSenseCompleted(uint8_t cylinderNumber, float dbv, float frequency, efitick_t lastKnockTime);
+	void onKnockSenseCompleted(uint8_t cylinderNumber, float dbv, efitick_t lastKnockTime);
 
 	float getKnockRetard() const;
 	uint32_t getKnockCount() const;
diff --git a/firmware/controllers/sensors/impl/software_knock.cpp b/firmware/controllers/sensors/impl/software_knock.cpp
index e109fd5319..6b509f0999 100644
--- a/firmware/controllers/sensors/impl/software_knock.cpp
+++ b/firmware/controllers/sensors/impl/software_knock.cpp
@@ -232,7 +232,7 @@ static void processLastKnockEvent() {
 	// clamp to reasonable range
 	db = clampF(-100, db, 100);
 
-	engine->module<KnockController>()->onKnockSenseCompleted(currentCylinderNumber, db, 0/* looks like we have a defect mainFreq*/, lastKnockTime);
+	engine->module<KnockController>()->onKnockSenseCompleted(currentCylinderNumber, db, lastKnockTime);
 }
 
 void KnockThread::ThreadTask() {
diff --git a/firmware/hw_layer/sensors/hip9011.cpp b/firmware/hw_layer/sensors/hip9011.cpp
index d3894ba8dd..065ed1e4b9 100644
--- a/firmware/hw_layer/sensors/hip9011.cpp
+++ b/firmware/hw_layer/sensors/hip9011.cpp
@@ -507,7 +507,7 @@ static msg_t hipThread(void *arg) {
 			/* Check for correct cylinder/input */
 			if (correctCylinder) {
 				// TODO: convert knock level to dBv
-				engine->module<KnockController>()->onKnockSenseCompleted(instance.cylinderNumber, knockVolts, 0, instance.knockSampleTimestamp);
+				engine->module<KnockController>()->onKnockSenseCompleted(instance.cylinderNumber, knockVolts, instance.knockSampleTimestamp);
 
 				#if EFI_HIP_9011_DEBUG
 					/* debug */
diff --git a/unit_tests/tests/test_knock.cpp b/unit_tests/tests/test_knock.cpp
index db6fb3efdc..bc222bc2eb 100644
--- a/unit_tests/tests/test_knock.cpp
+++ b/unit_tests/tests/test_knock.cpp
@@ -33,20 +33,20 @@ TEST(Knock, Retards) {
 
 	// Send some weak knocks, should yield no response
 	for (size_t i = 0; i < 10; i++) {
-		dut.onKnockSenseCompleted(0, 10, 0, 0);
+		dut.onKnockSenseCompleted(0, 10, 0);
 	}
 
 	EXPECT_FLOAT_EQ(dut.getKnockRetard(), 0);
 
 	// Send a strong knock!
-	dut.onKnockSenseCompleted(0, 30, 0, 0);
+	dut.onKnockSenseCompleted(0, 30, 0);
 
 	// Should retard 10% of the distance between current timing and "maximum"
 	EXPECT_FLOAT_EQ(dut.getKnockRetard(), 2);
 
 	// Send tons of strong knocks, make sure we don't go over the configured limit
 	for (size_t i = 0; i < 100; i++) {
-		dut.onKnockSenseCompleted(0, 30, 0, 0);
+		dut.onKnockSenseCompleted(0, 30, 0);
 	}
 
 	EXPECT_FLOAT_EQ(dut.getKnockRetard(), 8);
@@ -64,7 +64,7 @@ TEST(Knock, Reapply) {
 	engineConfiguration->knockRetardReapplyRate = 1;
 
 	// Send a strong knock!
-	dut.onKnockSenseCompleted(0, 30, 0, 0);
+	dut.onKnockSenseCompleted(0, 30, 0);
 
 	// Should retard 10% of the distance between current timing and "maximum"
 	EXPECT_FLOAT_EQ(dut.getKnockRetard(), 2);