diff --git a/variants/mkrwan1300/variant.cpp b/variants/mkrwan1300/variant.cpp
index 24334d79f..c9a19c5be 100644
--- a/variants/mkrwan1300/variant.cpp
+++ b/variants/mkrwan1300/variant.cpp
@@ -156,9 +156,9 @@ const PinDescription g_APinDescription[] = {
   { PORTA,  0, PIO_DIGITAL,    (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTA,  1, PIO_DIGITAL,    (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
 
-  { PORTA, 12, PIO_SERCOM,      (PIN_ATTR_NONE                               ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MOSI: SERCOM4/PAD[0]
-  { PORTA, 13, PIO_SERCOM,      (PIN_ATTR_NONE                               ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCK:  SERCOM4/PAD[1]
-  { PORTA, 15, PIO_SERCOM,      (PIN_ATTR_NONE                               ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MISO: SERCOM4/PAD[3]
+  { PORTA, 12, PIO_SERCOM_ALT, (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MOSI: SERCOM4/PAD[0]
+  { PORTA, 13, PIO_SERCOM_ALT, (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCK:  SERCOM4/PAD[1]
+  { PORTA, 15, PIO_SERCOM_ALT, (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MISO: SERCOM4/PAD[3]
 };
 
 const void* g_apTCInstances[TCC_INST_NUM + TC_INST_NUM]={ TCC0, TCC1, TCC2, TC3, TC4, TC5 };