diff --git a/flix/motors.ino b/flix/motors.ino
index 0c17cd1..5b25f3f 100644
--- a/flix/motors.ino
+++ b/flix/motors.ino
@@ -26,8 +26,8 @@ void setupMotors() {
 	Serial.println("Motors initialized");
 }
 
-uint8_t signalToDutyCycle(float control) {
-	float duty = mapff(control, 0, 1, 0, (1 << PWM_RESOLUTION) - 1);
+uint8_t signalToDutyCycle(float signal) {
+	float duty = mapff(signal, 0, 1, 0, (1 << PWM_RESOLUTION) - 1);
 	return round(constrain(duty, 0, (1 << PWM_RESOLUTION) - 1));
 }
 
diff --git a/gazebo/Arduino.h b/gazebo/Arduino.h
index 86b9870..d305865 100644
--- a/gazebo/Arduino.h
+++ b/gazebo/Arduino.h
@@ -111,7 +111,7 @@ public:
 class HardwareSerial: public Print {
 public:
 	void begin(unsigned long baud) {
-		// server is running in background by default, so doesn't have access to stdin
+		// server is running in background by default, so it doesn't have access to stdin
 		// https://github.com/gazebosim/gazebo-classic/blob/d45feeb51f773e63960616880b0544770b8d1ad7/gazebo/gazebo_main.cc#L216
 		// set foreground process group to current process group to allow reading from stdin
 		// https://stackoverflow.com/questions/58918188/why-is-stdin-not-propagated-to-child-process-of-different-process-group
diff --git a/gazebo/Preferences.h b/gazebo/Preferences.h
index 30cb75d..73bf589 100644
--- a/gazebo/Preferences.h
+++ b/gazebo/Preferences.h
@@ -36,8 +36,6 @@ public:
 		return true;
 	}
 
-	void end();
-
 	bool isKey(const char *key) {
 		return storage.find(key) != storage.end();
 	}