diff --git a/Marlin/src/pins/pins_STM32F4.h b/Marlin/src/pins/pins_STM32F4.h
index addc6a3ea..2cb8c7ae3 100644
--- a/Marlin/src/pins/pins_STM32F4.h
+++ b/Marlin/src/pins/pins_STM32F4.h
@@ -27,12 +27,12 @@
 #define DEFAULT_MACHINE_NAME "STM32F407VET6"
 #define BOARD_NAME "STM32F4 Board"
 
-// #define I2C_EEPROM
+//#define I2C_EEPROM
 
 #define E2END 0xFFF // EEPROM end address (4kB)
 
 // Ignore temp readings during develpment.
-// #define BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
+//#define BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
 
 #if E_STEPPERS > 2 || HOTENDS > 2
   #error "STM32F4 supports up to 2 hotends / E-steppers."
@@ -52,9 +52,9 @@
 // Z Probe (when not Z_MIN_PIN)
 //
 
-// #ifndef Z_MIN_PROBE_PIN
-//   #define Z_MIN_PROBE_PIN  PA4
-// #endif
+//#ifndef Z_MIN_PROBE_PIN
+//  #define Z_MIN_PROBE_PIN  PA4
+//#endif
 
 //
 // Steppers
@@ -63,37 +63,37 @@
 #define X_STEP_PIN         PD3
 #define X_DIR_PIN          PD2
 #define X_ENABLE_PIN       PD0
-// #ifndef X_CS_PIN
-//   #define X_CS_PIN         PD1
-// #endif
+//#ifndef X_CS_PIN
+//  #define X_CS_PIN         PD1
+//#endif
 
 #define Y_STEP_PIN         PE11
 #define Y_DIR_PIN          PE10
 #define Y_ENABLE_PIN       PE13
-// #ifndef Y_CS_PIN
-//   #define Y_CS_PIN         PE12
-// #endif
+//#ifndef Y_CS_PIN
+//  #define Y_CS_PIN         PE12
+//#endif
 
 #define Z_STEP_PIN         PD6
 #define Z_DIR_PIN          PD7
 #define Z_ENABLE_PIN       PD4
-// #ifndef Z_CS_PIN
-//   #define Z_CS_PIN         PD5
-// #endif
+//#ifndef Z_CS_PIN
+//  #define Z_CS_PIN         PD5
+//#endif
 
 #define E0_STEP_PIN        PB5
 #define E0_DIR_PIN         PB6
 #define E0_ENABLE_PIN      PB3
-// #ifndef E0_CS_PIN
-//   #define E0_CS_PIN         PB4
-// #endif
+//#ifndef E0_CS_PIN
+//  #define E0_CS_PIN         PB4
+//#endif
 
 #define E1_STEP_PIN        PE4
 #define E1_DIR_PIN         PE2
 #define E1_ENABLE_PIN      PE3
-// #ifndef E1_CS_PIN
-//   #define E1_CS_PIN         PE5
-// #endif
+//#ifndef E1_CS_PIN
+//  #define E1_CS_PIN         PE5
+//#endif
 
 #define SCK_PIN            PA5
 #define MISO_PIN           PA6
@@ -133,15 +133,15 @@
 // Prusa i3 MK2 Multi Material Multiplexer Support
 //
 
-// #define E_MUX0_PIN         PG3
-// #define E_MUX1_PIN         PG4
+//#define E_MUX0_PIN         PG3
+//#define E_MUX1_PIN         PG4
 
 //
 // Servos
 //
 
-// #define SERVO0_PIN         PE13
-// #define SERVO1_PIN         PE14
+//#define SERVO0_PIN         PE13
+//#define SERVO1_PIN         PE14
 
 
 #define SDSS               PE7