How to make gcc warn undefined struct?

Question

I have a struct defined in .h

struct buf_stats {
   // ***
};

then in .c file

struct buf_stats *bs = malloc(sizeof(struct buf_states*)) ;

where buf_states is a typo.

but gcc does not warn me, although I used -Wall

and this bug/typo cost me 3 hours to find out.

How to make gcc warn undefined struct like this?