diff --git a/Adafruit_I2CDevice.cpp b/Adafruit_I2CDevice.cpp
index 08da1ea..2633cf1 100644
--- a/Adafruit_I2CDevice.cpp
+++ b/Adafruit_I2CDevice.cpp
@@ -1,6 +1,6 @@
 #include "Adafruit_I2CDevice.h"
 
-//#define DEBUG_SERIAL Serial
+// #define DEBUG_SERIAL Serial
 
 /*!
  *    @brief  Create an I2C device at a given address
diff --git a/Adafruit_SPIDevice.cpp b/Adafruit_SPIDevice.cpp
index 034dc08..dc3672b 100644
--- a/Adafruit_SPIDevice.cpp
+++ b/Adafruit_SPIDevice.cpp
@@ -1,6 +1,6 @@
 #include "Adafruit_SPIDevice.h"
 
-//#define DEBUG_SERIAL Serial
+// #define DEBUG_SERIAL Serial
 
 /*!
  *    @brief  Create an SPI device with the given CS pin and settings
diff --git a/Adafruit_SPIDevice.h b/Adafruit_SPIDevice.h
index fad0fbd..d0d5ae1 100644
--- a/Adafruit_SPIDevice.h
+++ b/Adafruit_SPIDevice.h
@@ -56,7 +56,7 @@ typedef BitOrder BusIOBitOrder;
 // ports set and clear registers which are atomic.
 // typedef volatile uint32_t BusIO_PortReg;
 // typedef uint32_t BusIO_PortMask;
-//#define BUSIO_USE_FAST_PINIO
+// #define BUSIO_USE_FAST_PINIO
 
 #elif defined(__MBED__) || defined(__ZEPHYR__)
 // Boards based on RTOS cores like mbed or Zephyr are not going to expose the