diff --git a/include/unistd.h b/include/unistd.h
index eec9a95565e0..13afc190e8b5 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -199,10 +199,10 @@ int	 usleep __P((unsigned int));
 void	*valloc __P((size_t));			/* obsoleted by malloc() */
 pid_t	 vfork __P((void));
 
-extern optreset;			/* getopt(3) external variable */
 extern char *suboptarg;			/* getsubopt(3) external variable */
 int	 getsubopt __P((char **, char * const *, char **));
 #endif /* !_POSIX_SOURCE */
+extern int optreset;			/* getopt(3) external variable */
 __END_DECLS
 
 #endif /* !_UNISTD_H_ */