diff --git a/lib/private/Log/Systemdlog.php b/lib/private/Log/Systemdlog.php
index 40e9c12386..2d5759311d 100644
--- a/lib/private/Log/Systemdlog.php
+++ b/lib/private/Log/Systemdlog.php
@@ -68,6 +68,7 @@ class Systemdlog implements IWriter {
 	 * @param string $app
 	 * @param string $message
 	 * @param int $level
+	 * @suppress PhanUndeclaredMethod
 	 */
 	public function write(string $app, $message, int $level) {
 		$journal_level = $this->levels[$level];