diff --git a/qutebrowser/config/configdata.py b/qutebrowser/config/configdata.py
index 91588468d..0c0868dfe 100644
--- a/qutebrowser/config/configdata.py
+++ b/qutebrowser/config/configdata.py
@@ -936,7 +936,9 @@ def data(readonly=False):
             ('mode',
              SettingValue(typ.String(
                  valid_values=typ.ValidValues(
-                     ('number', "Use numeric hints."),
+                     ('number', "Use numeric hints. (In this mode you can "
+                      "also type letters form the hinted element to filter "
+                      "and reduce the number of elements that are hinted.)"),
                      ('letter', "Use the chars in the hints -> "
                       "chars setting."),
                      ('word', "Use hints words based on the html "