diff --git a/atmel-samd/boards/gemma_m0/pins.c b/atmel-samd/boards/gemma_m0/pins.c
index a51f2573ee..9e532ceb63 100644
--- a/atmel-samd/boards/gemma_m0/pins.c
+++ b/atmel-samd/boards/gemma_m0/pins.c
@@ -1,11 +1,15 @@
 #include "samd21_pins.h"
 
 STATIC const mp_map_elem_t board_global_dict_table[] = {
-    { MP_OBJ_NEW_QSTR(MP_QSTR_A1), (mp_obj_t)&pin_PA05 },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_D2), (mp_obj_t)&pin_PA05 },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_A1),  (mp_obj_t)&pin_PA05 }, // pad 1
+    { MP_OBJ_NEW_QSTR(MP_QSTR_D2),  (mp_obj_t)&pin_PA05 },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_RX),  (mp_obj_t)&pin_PA05 },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_SCL), (mp_obj_t)&pin_PA05 },
 
-    { MP_OBJ_NEW_QSTR(MP_QSTR_A2), (mp_obj_t)&pin_PA04 },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_D0), (mp_obj_t)&pin_PA04 },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_A2),  (mp_obj_t)&pin_PA04 }, // pad 0
+    { MP_OBJ_NEW_QSTR(MP_QSTR_D0),  (mp_obj_t)&pin_PA04 },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_TX),  (mp_obj_t)&pin_PA04 },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_SDA), (mp_obj_t)&pin_PA04 },
 
     { MP_OBJ_NEW_QSTR(MP_QSTR_A0), (mp_obj_t)&pin_PA02 },
     { MP_OBJ_NEW_QSTR(MP_QSTR_D1), (mp_obj_t)&pin_PA02 },