#include <sys/strtio.h> /* for TIOCCBRK on HP-UX */
#endif
#if defined(HAVE_SYS_PTMS_H) && defined(HAVE_DEV_PTMX)
+# if defined(HAVE_SYS_STREAM_H)
+# include <sys/stream.h> /* reqd for queue_t on Solaris 2.5.1 */
+# endif
#include <sys/ptms.h> /* for grantpt() and friends */
#endif