#define FIOQSIZE _IOR('f', 128, loff_t)
#elif defined(__arm__) || defined(__mc68000__) || defined(__s390__)
#define FIOQSIZE 0x545E
- #elif defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__ia64__) || defined(__parisc__) || defined(__cris__) || defined(__hppa__)
+ #elif defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__ia64__) || defined(__parisc__) || defined(__cris__) || defined(__hppa__) || defined(__x86_64__)
#define FIOQSIZE 0x5460
#elif defined(__mips__) || defined(__mips64__)
#define FIOQSIZE 0x6667