Use of unresolved identifier 'sqlite3_config' in swift

I'm trying to configure multi-threding connection to my sqlite DB as in this post: Setting sqlite config SQLITE_CONFIG_SERIALIZED returns SQLITE_MISUSE on iOS 5

But in swift when I'm using sqlite3_config function I receive this error "Use of unresolved identifier 'sqlite3_config'". I added sqlite3.h in my bridging header, and for ex. I can use sqlite3_threadsafe function without any problems...I can't understand why sqlite3_config gives me an error...