diff --git a/src/ContinuousStepper/Tickers/AnalogWriteFrequency.hpp b/src/ContinuousStepper/Tickers/AnalogWriteFrequency.hpp
index 8163316..de42967 100644
--- a/src/ContinuousStepper/Tickers/AnalogWriteFrequency.hpp
+++ b/src/ContinuousStepper/Tickers/AnalogWriteFrequency.hpp
@@ -11,7 +11,7 @@ class AwfOscillator {
     pin_ = pin;
   }
 
-  void start(unsigned int frequency) {
+  void start(frequency_t frequency) {
     analogWriteFrequency(pin_, frequency);
     if (!active_) {
       analogWrite(pin_, 128);
@@ -24,7 +24,7 @@ class AwfOscillator {
     active_ = false;
   }
 
-  unsigned int minFrequency() const {
+  frequency_t minFrequency() const {
     // The analogWriteFrequency function has a lower limit of a few Hz.
     // https://www.pjrc.com/teensy/td_pulse.html#frequency
     return 5;
diff --git a/src/ContinuousStepper/Tickers/KhoiH_PWM.hpp b/src/ContinuousStepper/Tickers/KhoiH_PWM.hpp
index fbf23d4..4552d73 100644
--- a/src/ContinuousStepper/Tickers/KhoiH_PWM.hpp
+++ b/src/ContinuousStepper/Tickers/KhoiH_PWM.hpp
@@ -16,7 +16,7 @@ class KhoihOscillator {
     pwm_ = new KhoiH_PWM(pin, 500, 0);
   }
 
-  void start(unsigned int frequency) {
+  void start(frequency_t frequency) {
     pwm_->setPWM(pin_, frequency, 50);
   }
 
@@ -24,7 +24,7 @@ class KhoihOscillator {
     pwm_->setPWM(pin_, 500, 0);
   }
 
-  unsigned int minFrequency() const {
+  frequency_t minFrequency() const {
     return 1;
   }
 
diff --git a/src/ContinuousStepper/Tickers/OscillatorTicker.hpp b/src/ContinuousStepper/Tickers/OscillatorTicker.hpp
index 847bd39..f04ccfc 100644
--- a/src/ContinuousStepper/Tickers/OscillatorTicker.hpp
+++ b/src/ContinuousStepper/Tickers/OscillatorTicker.hpp
@@ -4,6 +4,8 @@
 
 namespace ArduinoContinuousStepper {
 
+using frequency_t = unsigned int;
+
 template <class TOscillator>
 class OscillatorTicker : StepperTicker {
   using time_t = unsigned long;
diff --git a/src/ContinuousStepper/Tickers/Tone.hpp b/src/ContinuousStepper/Tickers/Tone.hpp
index 72aeddb..5430dfe 100644
--- a/src/ContinuousStepper/Tickers/Tone.hpp
+++ b/src/ContinuousStepper/Tickers/Tone.hpp
@@ -11,7 +11,7 @@ class ToneOscillator {
     pin_ = pin;
   }
 
-  void start(unsigned int frequency) {
+  void start(frequency_t frequency) {
     tone(pin_, frequency);
   }
 
@@ -19,7 +19,7 @@ class ToneOscillator {
     noTone(pin_);
   }
 
-  unsigned int minFrequency() const {
+  frequency_t minFrequency() const {
 #if defined(ARDUINO_ARCH_AVR)
     // It is not possible to generate tones lower than 31Hz
     // https://www.arduino.cc/reference/en/language/functions/advanced-io/tone/