Proper way to convert BOOL value into INT?

Everytime when I tried to convert BOOL value into int. INT value is showing -8 for True and 0 for False. Ideally it should return 1 for true.

I have tried all possible ways of conversion like

int val=Info.isattachementDownloadable;
int val=[[NSString stringWithFormat:@"%d", Info.isattachementDownloadable] intValue];
int val=(int)Info.isattachementDownloadable;

where Info.isattachementDownloadable return BOOL

In all ways its showing -8 for TRUE.

Any suggestion ?