diff --git a/Adafruit_ESP32_Arduino_Demos/SerialESPPassthrough/SerialESPPassthrough.ino b/Adafruit_ESP32_Arduino_Demos/SerialESPPassthrough/SerialESPPassthrough.ino
index 8bb42f739..9948e66f0 100644
--- a/Adafruit_ESP32_Arduino_Demos/SerialESPPassthrough/SerialESPPassthrough.ino
+++ b/Adafruit_ESP32_Arduino_Demos/SerialESPPassthrough/SerialESPPassthrough.ino
@@ -33,7 +33,8 @@ unsigned long baud = 115200;
   defined(ADAFRUIT_ITSYBITSY_M0) || \
   defined(ADAFRUIT_ITSYBITSY_M4_EXPRESS) || \
   defined(ARDUINO_AVR_ITSYBITSY32U4_3V) || \
-  defined(ARDUINO_NRF52_ITSYBITSY)
+  defined(ARDUINO_NRF52_ITSYBITSY) || \
+  defined(ARDUINO_PYGAMER_M4_EXPRESS)
   // Configure the pins used for the ESP32 connection
   #define SerialESP32   Serial1
   #define SPIWIFI       SPI  // The SPI port