diff --git a/variants/XMC1400/config/XMC1400_Arduino_Kit/pins_arduino.h b/variants/XMC1400/config/XMC1400_Arduino_Kit/pins_arduino.h
index fd9d81ae..fee81d44 100644
--- a/variants/XMC1400/config/XMC1400_Arduino_Kit/pins_arduino.h
+++ b/variants/XMC1400/config/XMC1400_Arduino_Kit/pins_arduino.h
@@ -79,6 +79,11 @@ extern const uint8_t NUM_ANALOG_INPUTS;
#define PIN_SPI_MISO 12
#define PIN_SPI_SCK 13
+extern uint8_t SS;
+extern uint8_t MOSI;
+extern uint8_t MISO;
+extern uint8_t SCK;
+
#define A0 0
#define A1 1
#define A2 2
diff --git a/variants/XMC1400/config/XMC1400_XMC2GO/pins_arduino.h b/variants/XMC1400/config/XMC1400_XMC2GO/pins_arduino.h
index 9642842c..1525ee19 100644
--- a/variants/XMC1400/config/XMC1400_XMC2GO/pins_arduino.h
+++ b/variants/XMC1400/config/XMC1400_XMC2GO/pins_arduino.h
@@ -85,6 +85,11 @@ extern const uint8_t NUM_ANALOG_INPUTS;
#define PIN_SPI_MISO 0
#define PIN_SPI_SCK 2
+extern uint8_t SS;
+extern uint8_t MOSI;
+extern uint8_t MISO;
+extern uint8_t SCK;
+
// Define analog pin
#define A0 0
#define A1 1