diff --git a/src/Arduino_10BASE_T1S.h b/src/Arduino_10BASE_T1S.h
index 8f1d1a3..d6b59dc 100644
--- a/src/Arduino_10BASE_T1S.h
+++ b/src/Arduino_10BASE_T1S.h
@@ -31,11 +31,7 @@
  * CONSTANTS
  **************************************************************************************/
 
-#if defined(ARDUINO_SAMD_NANO_33_IOT)
-static int const CS_PIN    = 10;
-static int const RESET_PIN =  9;
-static int const IRQ_PIN   =  2;
-#elif defined(ARDUINO_SAMD_ZERO) || defined(ARDUINO_MINIMA) || defined(ARDUINO_UNOWIFIR4) || defined(ARDUINO_AVR_UNO_WIFI_REV2) || defined(ARDUINO_GIGA)
+#if defined(ARDUINO_SAMD_ZERO) || defined(ARDUINO_MINIMA) || defined(ARDUINO_UNOWIFIR4) || defined(ARDUINO_AVR_UNO_WIFI_REV2) || defined(ARDUINO_GIGA)
 /* Those are all boards with the Arduino Uno form factor for the T1S shield. */
 static int const CS_PIN    =  9;
 static int const RESET_PIN =  4;