From b8e9921f3d4521ad0c2bd5f2b4e9ac4f2f818c6c Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 10 May 2018 16:20:58 +0530
Subject: [PATCH] Forgot this file in previous commit

---
 kittens/tui/operations.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kittens/tui/operations.py b/kittens/tui/operations.py
index 14f62572f..5d4ae6445 100644
--- a/kittens/tui/operations.py
+++ b/kittens/tui/operations.py
@@ -74,7 +74,9 @@ def set_cursor_position(x, y) -> str:  # (0, 0) is top left
     return '\033[{};{}H'.format(y + 1, x + 1)
 
 
-def set_scrolling_region(screen_size, top=None, bottom=None) -> str:
+def set_scrolling_region(screen_size=None, top=None, bottom=None) -> str:
+    if screen_size is None:
+        return '\033[r'
     if top is None:
         top = 0
     if bottom is None: