diff --git a/ContactPage_body.php b/ContactPage_body.php
index 0e5c5a6..86d2730 100644
--- a/ContactPage_body.php
+++ b/ContactPage_body.php
@@ -201,7 +201,7 @@ class SpecialContact extends UnlistedSpecialPage {
 			];
 		}
 
-		$form = HTMLForm::factory( $config['DisplayFormat'],
+		$form = HTMLForm::factory( 'ooui',
 			$formItems, $this->getContext(), "contactpage-{$this->formType}"
 		);
 		$form->setWrapperLegendMsg( 'contactpage-legend' );
diff --git a/README b/README
index 1afb099..f73016c 100644
--- a/README
+++ b/README
@@ -80,10 +80,6 @@ It should be noted that type 'selectandother' is not currently supported.
       ),
   ),
 
-DisplayFormat is used to configure the HTMLForm. See HTMLForm documentation
-for possible values. Recommended value is "ooui" for consistency with other
-forms and better mobile rendering.
-
 RLModules can be used to add ResourceLoader modules (custom CSS and
 JavaScript) to the page.
 
diff --git a/extension.json b/extension.json
index 804cb24..463469b 100644
--- a/extension.json
+++ b/extension.json
@@ -19,14 +19,12 @@
 	},
 	"config": {
 		"ContactConfig": {
-			"@doc": "Use DisplayFormat `ooui` for compatibility with most skins.",
 			"default": {
 				"RecipientUser": null,
 				"SenderEmail": null,
 				"SenderName": null,
 				"RequireDetails": false,
 				"IncludeIP": false,
-				"DisplayFormat": "ooui",
 				"RLModules": [],
 				"RLStyleModules": [],
 				"AdditionalFields": {