diff --git a/book/src/themes.md b/book/src/themes.md
index e03782db3795..ce4cfa61dd35 100644
--- a/book/src/themes.md
+++ b/book/src/themes.md
@@ -217,6 +217,8 @@ These scopes are used for theming the editor interface.
 | `ui.cursor.select`        |                                                |
 | `ui.cursor.match`         | Matching bracket etc.                          |
 | `ui.cursor.primary`       | Cursor with primary selection                  |
+| `ui.gutter`               | Gutter                                         |
+| `ui.gutter.selected`      | Gutter for the line the cursor is on           |
 | `ui.linenr`               | Line numbers                                   |
 | `ui.linenr.selected`      | Line number for the line the cursor is on      |
 | `ui.statusline`           | Statusline                                     |