diff --git a/hardware/arduino/sam/variants/arduino_due_x/variant.h b/hardware/arduino/sam/variants/arduino_due_x/variant.h
index 1445ce14f..caaba57dd 100644
--- a/hardware/arduino/sam/variants/arduino_due_x/variant.h
+++ b/hardware/arduino/sam/variants/arduino_due_x/variant.h
@@ -56,9 +56,9 @@ extern "C"{
 
 // Number of pins defined in PinDescription array
 #define PINS_COUNT           (79u)
-#define NUM_DIGITAL_PINS     (54u)
+#define NUM_DIGITAL_PINS     (66u)
 #define NUM_ANALOG_INPUTS    (12u)
-#define analogInputToDigitalPin(p)  ((p < NUM_ANALOG_INPUTS) ? (p) + NUM_DIGITAL_PINS : -1)
+#define analogInputToDigitalPin(p)  ((p < 12u) ? (p) + 54u : -1)
 
 #define digitalPinToPort(P)        ( g_APinDescription[P].pPort )
 #define digitalPinToBitMask(P)     ( g_APinDescription[P].ulPin )