diff --git a/apps/provisioning_api/lib/Controller/AUserData.php b/apps/provisioning_api/lib/Controller/AUserData.php
index 108d24576d9..bbb3abe3c24 100644
--- a/apps/provisioning_api/lib/Controller/AUserData.php
+++ b/apps/provisioning_api/lib/Controller/AUserData.php
@@ -12,6 +12,7 @@ declare(strict_types=1);
  * @author John Molakvoæ <skjnldsv@protonmail.com>
  * @author Roeland Jago Douma <roeland@famdouma.nl>
  * @author Vincent Petry <vincent@nextcloud.com>
+ * @author Kate Döen <kate.doeen@nextcloud.com>
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -175,6 +176,7 @@ abstract class AUserData extends OCSController {
 			}
 
 			$data[IAccountManager::PROPERTY_DISPLAYNAME] = $targetUserObject->getDisplayName();
+			$data[IAccountManager::PROPERTY_DISPLAYNAME_LEGACY] = $data[IAccountManager::PROPERTY_DISPLAYNAME];
 			if ($includeScopes) {
 				$data[IAccountManager::PROPERTY_DISPLAYNAME . self::SCOPE_SUFFIX] = $userAccount->getProperty(IAccountManager::PROPERTY_DISPLAYNAME)->getScope();
 			}
diff --git a/apps/provisioning_api/lib/Controller/UsersController.php b/apps/provisioning_api/lib/Controller/UsersController.php
index 97d66acd2e0..f5bbf4899a4 100644
--- a/apps/provisioning_api/lib/Controller/UsersController.php
+++ b/apps/provisioning_api/lib/Controller/UsersController.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
  * @author Thomas Müller <thomas.mueller@tmit.eu>
  * @author Tom Needham <tom@owncloud.com>
  * @author Vincent Petry <vincent@nextcloud.com>
+ * @author Kate Döen <kate.doeen@nextcloud.com>
  *
  * @license AGPL-3.0
  *
@@ -546,10 +547,6 @@ class UsersController extends AUserData {
 		$user = $this->userSession->getUser();
 		if ($user) {
 			$data = $this->getUserData($user->getUID(), true);
-			// rename "displayname" to "display-name" only for this call to keep
-			// the API stable.
-			$data['display-name'] = $data['displayname'];
-			unset($data['displayname']);
 			return new DataResponse($data);
 		}
 
diff --git a/lib/public/Accounts/IAccountManager.php b/lib/public/Accounts/IAccountManager.php
index 7c977b575ae..68eca469ad9 100644
--- a/lib/public/Accounts/IAccountManager.php
+++ b/lib/public/Accounts/IAccountManager.php
@@ -10,6 +10,7 @@ declare(strict_types=1);
  * @author Julius Härtl <jus@bitgrid.net>
  * @author Thomas Citharel <nextcloud@tcit.fr>
  * @author Vincent Petry <vincent@nextcloud.com>
+ * @author Kate Döen <kate.doeen@nextcloud.com>
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -106,6 +107,7 @@ interface IAccountManager {
 
 	public const PROPERTY_AVATAR = 'avatar';
 	public const PROPERTY_DISPLAYNAME = 'displayname';
+	public const PROPERTY_DISPLAYNAME_LEGACY = 'display-name';
 	public const PROPERTY_PHONE = 'phone';
 	public const PROPERTY_EMAIL = 'email';
 	public const PROPERTY_WEBSITE = 'website';