diff --git a/Firmware/Configuration_adv.h b/Firmware/Configuration_adv.h
index f739cde2..9225ec25 100644
--- a/Firmware/Configuration_adv.h
+++ b/Firmware/Configuration_adv.h
@@ -281,7 +281,7 @@
  * Assumption: advance [steps] = k * (delta velocity [steps/s])
  * K=0 means advance disabled.
  *
- * NOTE: K values for LIN_ADVANCE 1.5 differ from earlier versions!
+ * NOTE: K values for LIN_ADVANCE 1.5 differs from earlier versions!
  *
  * Set K around 0.22 for 3mm PLA Direct Drive with ~6.5cm between the drive gear and heatbreak.
  * Larger K values will be needed for flexible filament and greater distances.
diff --git a/Firmware/stepper.cpp b/Firmware/stepper.cpp
index d0b1d312..fda9f11c 100644
--- a/Firmware/stepper.cpp
+++ b/Firmware/stepper.cpp
@@ -779,7 +779,7 @@ FORCE_INLINE void isr() {
     uint8_t la_state = 0;
 #endif
 
-    // Calculare new timer value
+    // Calculate new timer value
     // 13.38-14.63us for steady state,
     // 25.12us for acceleration / deceleration.
     {
@@ -850,8 +850,8 @@ FORCE_INLINE void isr() {
         }
     }
 
-    // Check for serial chars. This executes roughtly between 50-60% of the total length of the isr,
-    // making this spot a much better choice than checking during esteps
+    // Check for serial chars. This executes roughtly inbetween 50-60% of the total runtime of the
+    // entire isr, making this spot a much better choice than checking during esteps
     MSerial.checkRx();
 #endif