diff --git a/lib/private/User/DisplayNameCache.php b/lib/private/User/DisplayNameCache.php
index 114ec3627dd75..41ee540bef4ae 100644
--- a/lib/private/User/DisplayNameCache.php
+++ b/lib/private/User/DisplayNameCache.php
@@ -24,6 +24,8 @@
  * @template-implements IEventListener<UserChangedEvent|UserDeletedEvent>
  */
 class DisplayNameCache implements IEventListener {
+	private const CACHE_TTL = 24 * 60 * 60; // 1 day
+
 	/** @see \OC\Config\UserConfig::USER_MAX_LENGTH */
 	public const MAX_USERID_LENGTH = 64;
 	private array $cache = [];
@@ -57,7 +59,7 @@ public function getDisplayName(string $userId): ?string {
 			$displayName = null;
 		}
 		$this->cache[$userId] = $displayName;
-		$this->memCache->set($userId, $displayName, 60 * 10); // 10 minutes
+		$this->memCache->set($userId, $displayName, self::CACHE_TTL);
 
 		return $displayName;
 	}
@@ -72,7 +74,7 @@ public function handle(Event $event): void {
 			$userId = $event->getUser()->getUID();
 			$newDisplayName = $event->getValue();
 			$this->cache[$userId] = $newDisplayName;
-			$this->memCache->set($userId, $newDisplayName, 60 * 10); // 10 minutes
+			$this->memCache->set($userId, $newDisplayName, self::CACHE_TTL);
 		}
 		if ($event instanceof UserDeletedEvent) {
 			$userId = $event->getUser()->getUID();