The whole bassline to this song is based on the A scale.

Verse:

-------------------------------------------
-------6-4--------4------------------------
-7-7-X-----7----4---7------7---------7-----
--------------7--------4-5---4---4-5---5---

Chorus:
 E	      D5
----4---------------
------6-4---6-7-----
-7--------------7---
------------------5-

Bye. Den.