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-rw-r--r--src/systty.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/systty.h b/src/systty.h
index 2eacfdb2716..1548952e7a8 100644
--- a/src/systty.h
+++ b/src/systty.h
@@ -118,3 +118,6 @@ struct emacs_tty {
extern int emacs_get_tty (int, struct emacs_tty *);
extern int emacs_set_tty (int, struct emacs_tty *, int);
+/* From sysdep.c or w32.c */
+extern int serial_open (char *);
+extern void serial_configure (struct Lisp_Process *, Lisp_Object);