Passing a pointer to an array to a function

I'm trying to modify elements of an array in a function. This works fine when kept in main but when I port it to a function it segfaults after accessing the first member of the array.

The code below is just a reduced version of my actual code to show where I'm getting the segfault.

#include <stdio.h>
#include <stdlib.h>

typedef struct {
    unsigned short id;
} voter;

void initialise(voter** votersPtr, unsigned short *numOfVoters) {
    *votersPtr = malloc(sizeof(voter)*(*numOfVoters));

    for(int i = 0; i < *numOfVoters; i++) {
        votersPtr[i]->id = (unsigned short) i;
        printf("%hu \n", votersPtr[i]->id);
    }
}

int main(void) {
    unsigned short numOfVoters = 480;
    voter* voters = NULL;

    initialise(&voters, &numOfVoters);

    return EXIT_SUCCESS;
}

Any help would be greatly appreciated, thank you.