From b252504306976f5a47a4dd89b28f5562e7a3e2d3 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 15 Mar 2018 11:31:37 +0530
Subject: [PATCH] ...

---
 kitty/remote_control.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kitty/remote_control.py b/kitty/remote_control.py
index ea7b31f2d..b50a42fed 100644
--- a/kitty/remote_control.py
+++ b/kitty/remote_control.py
@@ -85,7 +85,10 @@ def ls(boss, window):
     argspec='FONT_SIZE'
 )
 def cmd_set_font_size(global_opts, opts, args):
-    return {'size': float(args[0])}
+    try:
+        return {'size': float(args[0])}
+    except IndexError:
+        raise SystemExit('No font size specified')
 
 
 def set_font_size(boss, window, payload):