diff --git a/assets/config_menu.rml b/assets/config_menu.rml
index e32e950..2cba326 100644
--- a/assets/config_menu.rml
+++ b/assets/config_menu.rml
@@ -33,7 +33,7 @@
 </head>
 <body class="window">
 	<!-- <handle move_target="#document"> -->
-		<div id="window" style="display:flex; flex-flow: column; background-color:rgba(0,0,0,0)" onkeydown="config_keydown">
+		<div id="window" class="rmlui-window rmlui-window--hidden" style="display:flex; flex-flow: column; background-color:rgba(0,0,0,0)" onkeydown="config_keydown">
 			<div class="centered-page" onclick="close_config_menu_backdrop">
 				<div class="centered-page__modal">
 					<tabset class="tabs" id="config_tabset">
diff --git a/src/ui/ui_renderer.cpp b/src/ui/ui_renderer.cpp
index ff582ff..25c77b3 100644
--- a/src/ui/ui_renderer.cpp
+++ b/src/ui/ui_renderer.cpp
@@ -797,9 +797,12 @@ struct UIContext {
                 current_document = find_it->second;
                 Rml::Element* window_el = current_document->GetElementById("window");
                 if (window_el != nullptr) {
-                    window_el->SetClassNames("rmlui-window");
+                    window_el->SetClassNames("rmlui-window rmlui-window--hidden");
                 }
                 current_document->Show();
+                if (window_el != nullptr) {
+                    window_el->SetClassNames("rmlui-window");
+                }
             }
             else {
                 current_document = nullptr;
