diff --git a/ports/atmel-samd/boards/seeeduino_wio_terminal/pins.c b/ports/atmel-samd/boards/seeeduino_wio_terminal/pins.c
index 45ff7c3361..8d9c76164e 100644
--- a/ports/atmel-samd/boards/seeeduino_wio_terminal/pins.c
+++ b/ports/atmel-samd/boards/seeeduino_wio_terminal/pins.c
@@ -60,7 +60,7 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_SD_MOSI),  MP_ROM_PTR(&pin_PC16) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_SD_SCK),  MP_ROM_PTR(&pin_PC17) },
     { MP_ROM_QSTR(MP_QSTR_SD_CS),  MP_ROM_PTR(&pin_PC19) },
-    { MP_ROM_QSTR(MP_QSTR_SD_DET),  MP_ROM_PTR(&pin_PC21) },
+    { MP_ROM_QSTR(MP_QSTR_SD_DET),  MP_ROM_PTR(&pin_PD21) },
 
     // Switch
     { MP_OBJ_NEW_QSTR(MP_QSTR_SWITCH_UP),  MP_ROM_PTR(&pin_PD20) },