diff --git a/Adafruit_SSD1351.cpp b/Adafruit_SSD1351.cpp
index e5e27e4..403abc6 100644
--- a/Adafruit_SSD1351.cpp
+++ b/Adafruit_SSD1351.cpp
@@ -39,6 +39,8 @@
   #define SPI_DEFAULT_FREQ 16000000 ///< ARC32 SPI default frequency
 #elif defined (__AVR__) || defined(TEENSYDUINO)
   #define SPI_DEFAULT_FREQ 8000000 ///< AVR SPI default frequency
+#elif defined(__SAMD51__)
+  #define SPI_DEFAULT_FREQ 12000000 ///< M4 SPI default frequency
 #elif defined(ESP8266) || defined (ARDUINO_MAXIM)
   #define SPI_DEFAULT_FREQ 16000000 ///< ESP8266 SPI default frequency
 #elif defined(ESP32)