defined(GC_IRIX_THREADS) || defined(GC_LINUX_THREADS) || \
defined(GC_HPUX_THREADS) || defined(GC_OSF1_THREADS) || \
defined(GC_DGUX386_THREADS) || defined(GC_DARWIN_THREADS) || \
- defined(GC_AIX_THREADS) || \
+ defined(GC_AIX_THREADS) || defined(GC_NETBSD_THREADS) || \
(defined(GC_WIN32_THREADS) && defined(__CYGWIN32__))
# define GC_PTHREADS
# endif