diff --git a/book/src/keymap.md b/book/src/keymap.md
index f7e5462f..19fd21bb 100644
--- a/book/src/keymap.md
+++ b/book/src/keymap.md
@@ -27,6 +27,7 @@
 | `F`         | Find previous char                                 | `find_prev_char`            |
 | `G`         | Go to line number `<n>`                            | `goto_line`                 |
 | `Alt-.`     | Repeat last motion (`f`, `t` or `m`)               | `repeat_last_motion`        |
+| `Alt-:`     | Ensures the selection is in forward direction      | `ensure_selections_forward` |
 | `Home`      | Move to the start of the line                      | `goto_line_start`           |
 | `End`       | Move to the end of the line                        | `goto_line_end`             |
 | `PageUp`    | Move page up                                       | `page_up`                   |