ZSH mapfile, how can I get the bash behaviour?

Question

Both bash and zsh support reading a file into an array, I'm used to the bash's way and am appalled by the zsh's behaviour: zsh starts the array from index 1! That's not the unix way.

Here is an example, let's create a file:

echo yay1 >> pp
echo yay2 >> pp
echo yay3 >> pp

And use the bash mapfile (-t prevents the newlines to be sucked into the array elements):

[~]$ mapfile -t arr < pp
[~]$ echo "${arr[0]}"
yay1
[~]$ echo "${arr[1]}"
yay2
[~]$ echo "${arr[2]}"
yay3

Cool, that's what I'm used to. Now let's try zsh (we need to load the module):

% zmodload zsh/mapfile                     
% arr=("${(f@)mapfile[pp]}")
% echo "${arr[0]}"          

% echo "${arr[1]}"
yay1
% echo "${arr[2]}"
yay2
% echo "${arr[3]}"
yay3

Ooops, that's not the unix way of indexing things.

How can I make the zsh's mapfile to start the array from index 0?