diff --git a/options.xhtml b/options.xhtml
index f38483606..9c9434910 100644
--- a/options.xhtml
+++ b/options.xhtml
@@ -107998,7 +107998,7 @@ attribute set of attribute set of string</p>
 <p>Modifier key that is used for all default keybindings.</p>
 
 <p><span class="emphasis"><em>Type:</em></span>
-one of “Shift”, “Control”, “Mod1”, “Mod2”, “Mod3”, “Mod4”, “Mod5”</p>
+one of “Shift”, “Control”, “Mod1”, “Mod2”, “Mod3”, “Mod4”, “Mod5” or string</p>
 
 <p><span class="emphasis"><em>Default:</em></span>
 <code class="literal">&quot;Mod1&quot;</code></p>
@@ -115350,7 +115350,7 @@ attribute set of attribute set of string</p>
 <p>Modifier key that is used for all default keybindings.</p>
 
 <p><span class="emphasis"><em>Type:</em></span>
-one of “Shift”, “Control”, “Mod1”, “Mod2”, “Mod3”, “Mod4”, “Mod5”</p>
+one of “Shift”, “Control”, “Mod1”, “Mod2”, “Mod3”, “Mod4”, “Mod5” or string</p>
 
 <p><span class="emphasis"><em>Default:</em></span>
 <code class="literal">&quot;Mod1&quot;</code></p>