diff --git a/Marlin/src/HAL/HAL_DUE/HAL_timers_Due.h b/Marlin/src/HAL/HAL_DUE/HAL_timers_Due.h
index 2ad740ae17..6fd59471e3 100644
--- a/Marlin/src/HAL/HAL_DUE/HAL_timers_Due.h
+++ b/Marlin/src/HAL/HAL_DUE/HAL_timers_Due.h
@@ -109,8 +109,8 @@ FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
   return pConfig->pTimerRegs->TC_CHANNEL[pConfig->channel].TC_CV;
 }
 
-FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_µs) {
-  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_µs * HAL_TICKS_PER_US;
+FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_us) {
+  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_us * HAL_TICKS_PER_US;
   if (HAL_timer_get_compare(timer_num) < mincmp) HAL_timer_set_compare(timer_num, mincmp);
 }
 
diff --git a/Marlin/src/HAL/HAL_LPC1768/HAL_timers.h b/Marlin/src/HAL/HAL_LPC1768/HAL_timers.h
index 1890a3001c..69fdcce974 100644
--- a/Marlin/src/HAL/HAL_LPC1768/HAL_timers.h
+++ b/Marlin/src/HAL/HAL_LPC1768/HAL_timers.h
@@ -120,8 +120,8 @@ FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
   return 0;
 }
 
-FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_µs) {
-  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_µs * HAL_TICKS_PER_US;
+FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_us) {
+  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_us * HAL_TICKS_PER_US;
   if (HAL_timer_get_compare(timer_num) < mincmp) HAL_timer_set_compare(timer_num, mincmp);
 }
 
diff --git a/Marlin/src/HAL/HAL_STM32F1/HAL_timers_Stm32f1.h b/Marlin/src/HAL/HAL_STM32F1/HAL_timers_Stm32f1.h
index 6f23bf4a05..492385f38d 100644
--- a/Marlin/src/HAL/HAL_STM32F1/HAL_timers_Stm32f1.h
+++ b/Marlin/src/HAL/HAL_STM32F1/HAL_timers_Stm32f1.h
@@ -154,8 +154,8 @@ FORCE_INLINE static hal_timer_t HAL_timer_get_compare(const uint8_t timer_num) {
   }
 }
 
-FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_µs) {
-  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_µs * HAL_TICKS_PER_US;
+FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_us) {
+  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_us * HAL_TICKS_PER_US;
   if (HAL_timer_get_compare(timer_num) < mincmp) HAL_timer_set_compare(timer_num, mincmp);
 }
 
diff --git a/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.cpp b/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.cpp
index a50c5c7f9c..2589db33d2 100644
--- a/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.cpp
+++ b/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.cpp
@@ -137,8 +137,8 @@ uint32_t HAL_timer_get_count(const uint8_t timer_num) {
   return __HAL_TIM_GetCounter(&timerConfig[timer_num].timerdef);
 }
 
-void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_µs) {
-  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_µs * HAL_TICKS_PER_US;
+void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_us) {
+  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_us * HAL_TICKS_PER_US;
   if (HAL_timer_get_compare(timer_num) < mincmp) HAL_timer_set_compare(timer_num, mincmp);
 }
 
diff --git a/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.h b/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.h
index 7dff146f4f..8f1eff9c13 100644
--- a/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.h
+++ b/Marlin/src/HAL/HAL_STM32F7/HAL_timers_STM32F7.h
@@ -96,7 +96,7 @@ void HAL_timer_disable_interrupt(const uint8_t timer_num);
 void HAL_timer_set_compare(const uint8_t timer_num, const uint32_t compare);
 hal_timer_t HAL_timer_get_compare(const uint8_t timer_num);
 uint32_t HAL_timer_get_count(const uint8_t timer_num);
-void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_µs);
+void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_us);
 
 void HAL_timer_isr_prologue(const uint8_t timer_num);
 
diff --git a/Marlin/src/HAL/HAL_TEENSY35_36/HAL_timers_Teensy.h b/Marlin/src/HAL/HAL_TEENSY35_36/HAL_timers_Teensy.h
index 0075a6b2ce..6e18a66ff2 100644
--- a/Marlin/src/HAL/HAL_TEENSY35_36/HAL_timers_Teensy.h
+++ b/Marlin/src/HAL/HAL_TEENSY35_36/HAL_timers_Teensy.h
@@ -105,8 +105,8 @@ FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
   return 0;
 }
 
-FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_µs) {
-  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_µs * HAL_TICKS_PER_US;
+FORCE_INLINE static void HAL_timer_restrain(const uint8_t timer_num, const uint16_t interval_us) {
+  const hal_timer_t mincmp = HAL_timer_get_count(timer_num) + interval_us * HAL_TICKS_PER_US;
   if (HAL_timer_get_compare(timer_num) < mincmp) HAL_timer_set_compare(timer_num, mincmp);
 }