diff --git a/firmware/controllers/algo/engine_configuration.h b/firmware/controllers/algo/engine_configuration.h
index 0106a81b9f..e33a3e3342 100644
--- a/firmware/controllers/algo/engine_configuration.h
+++ b/firmware/controllers/algo/engine_configuration.h
@@ -177,7 +177,9 @@ typedef struct {
 
 	adc_channel_mode_e adcHwChannelEnabled[HW_MAX_ADC_INDEX];
 
+	// offset 5760
 	brain_pin_e triggerInputPins[3];
+	// offset 5772
 	brain_pin_e mainRelayPin;
 
 	int idleThreadPeriod;
diff --git a/firmware/hw_layer/hw_layer.mk b/firmware/hw_layer/hw_layer.mk
index c9dfed56f8..71ad313da3 100644
--- a/firmware/hw_layer/hw_layer.mk
+++ b/firmware/hw_layer/hw_layer.mk
@@ -24,6 +24,7 @@ HW_LAYER_EMS_CPP = $(PROJECT_DIR)/hw_layer/hardware.cpp \
 	$(PROJECT_DIR)/hw_layer/max31855.cpp \
 	$(PROJECT_DIR)/hw_layer/joystick.cpp \
 	$(PROJECT_DIR)/hw_layer/stepper.cpp \
+	$(PROJECT_DIR)/hw_layer/servo.cpp \
 	$(PROJECT_DIR)/hw_layer/stm32f4/mpu_util.cpp
 
 HW_LAYER_EGT_CPP = $(PROJECT_DIR)/hw_layer/can_hw.cpp \
diff --git a/firmware/hw_layer/servo.cpp b/firmware/hw_layer/servo.cpp
new file mode 100644
index 0000000000..2b9541f61c
--- /dev/null
+++ b/firmware/hw_layer/servo.cpp
@@ -0,0 +1,12 @@
+/**
+ * @file	servo.cpp
+ *
+ * http://rusefi.com/wiki/index.php?title=Hardware:Servo_motor
+ *
+ * @date Jan 3, 2015
+ * @author Andrey Belomutskiy, (c) 2012-2014
+ */
+
+#include "servo.h"
+#include "pin_repository.h"
+
diff --git a/firmware/hw_layer/servo.h b/firmware/hw_layer/servo.h
new file mode 100644
index 0000000000..b06f254210
--- /dev/null
+++ b/firmware/hw_layer/servo.h
@@ -0,0 +1,13 @@
+/**
+ * @file	servo.h
+ *
+ * @date Jan 3, 2015
+ * @author Andrey Belomutskiy, (c) 2012-2014
+ */
+#ifndef HW_LAYER_SERVO_H_
+#define HW_LAYER_SERVO_H_
+
+#include "main.h"
+
+
+#endif /* HW_LAYER_SERVO_H_ */