diff --git a/pathnames.h.in b/pathnames.h.in
index 220c521c0..1ddc2e56e 100644
--- a/pathnames.h.in
+++ b/pathnames.h.in
@@ -46,6 +46,10 @@
 #define _PATH_SUDO_STMP		"/etc/stmp"
 #endif /* _PATH_SUDO_STMP */
 
+#ifndef _PATH_TTY
+#define _PATH_TTY		"/dev/tty"
+#endif /* _PATH_TTY */
+
 #ifndef _PATH_VI
 #undef _PATH_VI
 #endif /* _PATH_VI */