diff --git a/variants/RASPBERRY_PI_PICO/pins_arduino.h b/variants/RASPBERRY_PI_PICO/pins_arduino.h
index 01c9ce9e4..1ff89e34e 100644
--- a/variants/RASPBERRY_PI_PICO/pins_arduino.h
+++ b/variants/RASPBERRY_PI_PICO/pins_arduino.h
@@ -38,8 +38,10 @@ static const uint8_t A3 = PIN_A3;
#define ADC_RESOLUTION 12
// Serial
-#define PIN_SERIAL_TX (0ul)
-#define PIN_SERIAL_RX (1ul)
+#define PIN_SERIAL1_TX (0ul)
+#define PIN_SERIAL1_RX (1ul)
+#define PIN_SERIAL2_TX (8ul)
+#define PIN_SERIAL2_RX (9ul)
// SPI
#define PIN_SPI_MISO (16u)
@@ -56,9 +58,11 @@ static const uint8_t SCK = PIN_SPI_SCK;
#define PIN_WIRE_SDA (4u)
#define PIN_WIRE_SCL (5u)
-#define SERIAL_HOWMANY 1
-#define SERIAL1_TX (digitalPinToPinName(PIN_SERIAL_TX))
-#define SERIAL1_RX (digitalPinToPinName(PIN_SERIAL_RX))
+#define SERIAL_HOWMANY 2
+#define SERIAL1_TX (digitalPinToPinName(PIN_SERIAL1_TX))
+#define SERIAL1_RX (digitalPinToPinName(PIN_SERIAL1_RX))
+#define SERIAL2_TX (digitalPinToPinName(PIN_SERIAL2_TX))
+#define SERIAL2_RX (digitalPinToPinName(PIN_SERIAL2_RX))
#define SERIAL_CDC 1
#define HAS_UNIQUE_ISERIAL_DESCRIPTOR
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