diff --git a/docs/theming.md b/docs/theming.md
index 422d6032d3..19967067de 100644
--- a/docs/theming.md
+++ b/docs/theming.md
@@ -29,7 +29,9 @@ Custom Themes
 
 Themes derived from the built in themes may also be defined in settings.
 
-To avoid name collisions, the internal name of a theme is `custom-${theme.name}`. So if you want to set the custom theme below as the default theme, you would use `default_theme: "custom-Electric Blue"`.
+To avoid name collisions, the internal name of a theme is
+`custom-${theme.name}`. So if you want to set the custom theme below as the
+default theme, you would use `default_theme: "custom-Electric Blue"`.
 
 eg. in config.json: