diff --git a/lib/private/Log/LogDetails.php b/lib/private/Log/LogDetails.php
index bd18eb983dbdf..b3ae23a377026 100644
--- a/lib/private/Log/LogDetails.php
+++ b/lib/private/Log/LogDetails.php
@@ -37,7 +37,7 @@ public function logDetails(string $app, $message, int $level): array {
 		$url = ($request->getRequestUri() !== '') ? $request->getRequestUri() : '--';
 		$method = is_string($request->getMethod()) ? $request->getMethod() : '--';
 		if ($this->config->getValue('installed', false)) {
-			$user = \OC_User::getUser() ?? '--';
+			$user = \OC_User::getUser() ?: '--';
 		} else {
 			$user = '--';
 		}