diff --git a/init.el b/init.el
index 6fc9592..86f2f37 100644
--- a/init.el
+++ b/init.el
@@ -1237,6 +1237,7 @@ If no name is given, list all bookmarks instead."
          ("f" . helpful-callable)
          ("v" . helpful-variable)
          ("k" . helpful-key)
+         ("o" . helpful-symbol)
          ("x" . helpful-command)
          ("F" . helpful-function)
          :map helpful-mode-map