--- gforth/Attic/io.c	1994/07/12 11:30:58	1.5
+++ gforth/Attic/io.c	1995/01/18 18:41:38	1.7
@@ -7,6 +7,8 @@
    Use -D_POSIX_VERSION for POSIX systems.
 */
 
+#include <unistd.h>
+
 #ifdef DOMAINOS
 #define _POSIX_VERSION
 #endif
@@ -31,10 +33,6 @@
 #  endif
 #endif
 
-#if defined (HAVE_UNISTD_H)
-#  include <unistd.h>
-#endif
-
 #define NEW_TTY_DRIVER
 #define HAVE_BSD_SIGNALS
 /*
@@ -52,7 +50,7 @@
 
 /* System V machines use termio. */
 #if !defined (_POSIX_VERSION)
-#  if defined (USG) || defined (hpux) || defined (Xenix) || defined (sgi) || defined (DGUX) || defined (ultrix)
+#  if defined (USG) || defined (hpux) || defined (Xenix) || defined (sgi) || defined (DGUX) || defined (ultrix) || defined (Solaris)
 #    undef NEW_TTY_DRIVER
 #    define TERMIO_TTY_DRIVER
 #    include <termio.h>