False positive : does not need to be #included with fields of structure

Reproducer is 3 files

#include "toto.h"
#include <stdio.h>

int main() {
	toto p;
	p.t = 3;
	printf("loli %llx\n", p.t);
	return 0;
}

#include "tata.h"

typedef struct toto {
	tata t;
} toto;

#include <stdint.h>

typedef int64_t tata;

Program compiles and behaves as expected cf :

clang lol.c
./a.out

But running cppclean gives a false positive

cppclean toto.h 
toto.h:1: 'tata.h' does not need to be #included

Removing the include fives compilation error :

clang lol.c
In file included from lol.c:1:
./toto.h:4:2: error: unknown type name 'tata'
        tata t;
        ^
1 error generated.

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