diff --git a/variants/ARDUINO_NANO33BLE/pins_arduino.h b/variants/ARDUINO_NANO33BLE/pins_arduino.h
index 8d2fd7283..f5d9ebe04 100644
--- a/variants/ARDUINO_NANO33BLE/pins_arduino.h
+++ b/variants/ARDUINO_NANO33BLE/pins_arduino.h
@@ -78,20 +78,20 @@ static const uint8_t A7  = PIN_A7;
 
 // Digital pins
 // -----------
-#define D0   0
-#define D1   1
-#define D2   2
-#define D3   3
-#define D4   4
-#define D5   5
-#define D6   6
-#define D7   7
-#define D8   8
-#define D9   9
-#define D10  10
-#define D11  11
-#define D12  12
-#define D13  13
+#define D0  (0u)
+#define D1  (1u)
+#define D2  (2u)
+#define D3  (3u)
+#define D4  (4u)
+#define D5  (5u)
+#define D6  (6u)
+#define D7  (7u)
+#define D8  (8u)
+#define D9  (9u)
+#define D10 (10u)
+#define D11 (11u)
+#define D12 (12u)
+#define D13 (13u)
 
 /*
  * Serial interfaces
diff --git a/variants/PORTENTA_H7_M4/pins_arduino.h b/variants/PORTENTA_H7_M4/pins_arduino.h
index 766db3d25..bfb15612f 100644
--- a/variants/PORTENTA_H7_M4/pins_arduino.h
+++ b/variants/PORTENTA_H7_M4/pins_arduino.h
@@ -39,6 +39,31 @@ static const uint8_t A5  = PIN_A5;
 static const uint8_t A6  = PIN_A6;
 #define ADC_RESOLUTION 12
 
+// Digital pins
+// -----------
+#define D0  (0u)
+#define D1  (1u)
+#define D2  (2u)
+#define D3  (3u)
+#define D4  (4u)
+#define D5  (5u)
+#define D6  (6u)
+#define D7  (7u)
+#define D8  (8u)
+#define D9  (9u)
+#define D10 (10u)
+#define D11 (11u)
+#define D12 (12u)
+#define D13 (13u)
+#define D14 (14u)
+#define D15 (15u)
+#define D16 (u16)
+#define D17 (u17)
+#define D18 (u18)
+#define D19 (u19)
+#define D20 (u20)
+#define D21 (u21)
+
 //DACs
 #define DAC           (A6)
 
@@ -104,4 +129,4 @@ void _ontouch1200bps_();
 
 #define CRYPTO_WIRE		Wire1
 
-#endif //__PINS_ARDUINO__
\ No newline at end of file
+#endif //__PINS_ARDUINO__
diff --git a/variants/PORTENTA_H7_M7/pins_arduino.h b/variants/PORTENTA_H7_M7/pins_arduino.h
index 2a497c71d..bab36b657 100644
--- a/variants/PORTENTA_H7_M7/pins_arduino.h
+++ b/variants/PORTENTA_H7_M7/pins_arduino.h
@@ -46,6 +46,31 @@ static const uint8_t A5  = PIN_A5;
 static const uint8_t A6  = PIN_A6;
 #define ADC_RESOLUTION 12
 
+// Digital pins
+// -----------
+#define D0  (0u)
+#define D1  (1u)
+#define D2  (2u)
+#define D3  (3u)
+#define D4  (4u)
+#define D5  (5u)
+#define D6  (6u)
+#define D7  (7u)
+#define D8  (8u)
+#define D9  (9u)
+#define D10 (10u)
+#define D11 (11u)
+#define D12 (12u)
+#define D13 (13u)
+#define D14 (14u)
+#define D15 (15u)
+#define D16 (u16)
+#define D17 (u17)
+#define D18 (u18)
+#define D19 (u19)
+#define D20 (u20)
+#define D21 (u21)
+
 //DACs
 #define DAC           (A6)