1 files changed, 5 insertions, 0 deletions

diff --git a/openbsd-compat/readpassphrase.c b/openbsd-compat/readpassphrase.c
index 8e5785520..fdef15809 100644
--- a/openbsd-compat/readpassphrase.c
+++ b/openbsd-compat/readpassphrase.c
@@ -42,6 +42,11 @@ static char rcsid[] = "$OpenBSD: readpassphrase.c,v 1.5 2001/06/27 13:23:30 djm
 # define _T_FLUSH       (TCSAFLUSH)
 #endif
 
+/* SunOS 4.x which lacks _POSIX_VDISABLE, but has VDISABLE */
+#if !defined(_POSIX_VDISABLE) && defined(VDISABLE)
+#  define _POSIX_VDISABLE       VDISABLE
+#endif
+
 char *
 readpassphrase(prompt, buf, bufsiz, flags)
         const char *prompt;