Turkish March Question?

I'm learning the song Sonata in A, K.331, Third Movement, aka Rondo Alla Turca, or The Turkish March, by Mozart. I'm having trouble at the part about 3/4 through the song where it goes from a4 or a5, I don't know which one it is, and it goes a-a an octave higher, b-b an octave higher, c#-c# an octave higher, and so on. I can reach the octaves and play them easily earlier on in the song, but I have a bit of trouble jumping from one note to an octave higher. Could someone give me some tips please? Thanks.