diff --git a/src/calibre/customize/profiles.py b/src/calibre/customize/profiles.py
index 222f6128e0..c872c9df38 100644
--- a/src/calibre/customize/profiles.py
+++ b/src/calibre/customize/profiles.py
@@ -279,6 +279,7 @@ class KoboReaderOutput(OutputProfile):
     description = _('This profile is intended for the Kobo Reader.')
 
     screen_size               = (590, 775)
+    comic_screen_size         = (540, 718)
     dpi                       = 168.451
     fbase                     = 12
     fsizes                    = [7.5, 9, 10, 12, 15.5, 20, 22, 24]