diff --git a/tty-keys.c b/tty-keys.c
index 7ba8579a..3c8bc7bf 100644
--- a/tty-keys.c
+++ b/tty-keys.c
@@ -1,4 +1,4 @@
-/* $Id: tty-keys.c,v 1.43 2009-11-08 23:33:17 tcunha Exp $ */
+/* $Id: tty-keys.c,v 1.44 2009-11-10 23:26:13 tcunha Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -38,7 +38,8 @@ struct tty_key *tty_keys_find1(
     		    struct tty_key *, const char *, size_t, size_t *);
 struct tty_key *tty_keys_find(struct tty *, const char *, size_t, size_t *);
 void		tty_keys_callback(int, short, void *);
-int		tty_keys_mouse(char *, size_t, size_t *, struct mouse_event *);
+int		tty_keys_mouse(
+		    const char *, size_t, size_t *, struct mouse_event *);
 
 struct tty_key_ent {
 	enum tty_code_code	code;
@@ -350,7 +351,7 @@ tty_keys_next(struct tty *tty)
 	struct tty_key		*tk;
 	struct timeval		 tv;
 	struct mouse_event	 mouse;
-	char			*buf;
+	const char		*buf;
 	size_t			 len, size;
 	cc_t			 bspace;
 	int			 key;
@@ -486,7 +487,7 @@ tty_keys_callback(unused int fd, unused short events, void *data)
 
 /* Handle mouse key input. */
 int
-tty_keys_mouse(char *buf, size_t len, size_t *size, struct mouse_event *m)
+tty_keys_mouse(const char *buf, size_t len, size_t *size, struct mouse_event *m)
 {
 	/*
 	 * Mouse sequences are \033[M followed by three characters indicating