diff --git a/web/kvm/index.html b/web/kvm/index.html
index 6458193f..99c23dbb 100644
--- a/web/kvm/index.html
+++ b/web/kvm/index.html
@@ -2124,7 +2124,7 @@
               <table>
                 <tr>
                   <td colspan="2">
-                    <select id="switch-edid-selector" size="8"></select>
+                    <select id="switch-edid-selector" size="8" style="width: -webkit-fill-available; width: -moz-available;"></select>
                   </td>
                   <td rowspan="2" style="vertical-align: top">
                     <table class="kv">
diff --git a/web/kvm/window-switch.pug b/web/kvm/window-switch.pug
index 7317ce6c..793b39aa 100644
--- a/web/kvm/window-switch.pug
+++ b/web/kvm/window-switch.pug
@@ -25,7 +25,10 @@ mixin color_slider_tr(name, title)
 			table
 				tr
 					td(colspan="2")
-						select#switch-edid-selector(size="8")
+						select#switch-edid-selector(
+							size="8"
+							style="width: -webkit-fill-available; width: -moz-available;"
+						)
 					td(rowspan="2" style="vertical-align: top")
 						table.kv
 							tr