diff --git a/lib/Provider/Command/MessageSend.php b/lib/Provider/Command/MessageSend.php
index 27a5bb2384..6f747135a2 100644
--- a/lib/Provider/Command/MessageSend.php
+++ b/lib/Provider/Command/MessageSend.php
@@ -140,7 +140,7 @@ protected function convertAddressArray(array $addresses): array {
 	 *
 	 * @since 4.0.0
 	 *
-	 * @param array $attachments collection of local attachment objects
+	 * @param array<int, LocalAttachment> $attachments collection of local attachment objects
 	 */
 	protected function purgeSavedAttachments(array $attachments): void {
 		foreach ($attachments as $attachment) {