the song is in drop D tuning so the low E strign is lowered 1 step to D. 
 
e------------------------------------------------------- 
b------------------------------------------------------- 
g------------------------------------------------------- 
d--------0-----------0------------0--------------------- 
a-----------0---3b------------------0---3--3---2--2---0- 
D--0--0----------------------0--0------------------------ 
 
repeat a few times, and this does appear in other parts of the song too, so  
listen carefully! :) Enjoy! and happy playing! 
 
GuitarGal87