===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/tty-keys.c,v
retrieving revision 1.59
retrieving revision 1.60
diff -u -r1.59 -r1.60
--- src/usr.bin/tmux/tty-keys.c	2013/03/26 14:14:08	1.59
+++ src/usr.bin/tmux/tty-keys.c	2013/10/10 11:49:42	1.60
@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-keys.c,v 1.59 2013/03/26 14:14:08 nicm Exp $ */
+/* $OpenBSD: tty-keys.c,v 1.60 2013/10/10 11:49:42 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -676,11 +676,17 @@
 		log_debug("mouse input: %.*s", (int) *size, buf);
 
 		/* Check and return the mouse input. */
-		if (b < 32 || x < 33 || y < 33)
+		if (b < 32)
 			return (-1);
 		b -= 32;
-		x -= 33;
-		y -= 33;
+		if (x >= 33)
+			x -= 33;
+		else
+			x = 256 - x;
+		if (y >= 33)
+			y -= 33;
+		else
+			y = 256 - y;
 	} else if (buf[2] == '<') {
 		/* Read the three inputs. */
 		*size = 3;