diff --git a/models.php b/models.php
index f5bf3d3..d6233a2 100644
--- a/models.php
+++ b/models.php
@@ -22,6 +22,7 @@ public function __construct($mention) {
 class WebmentionStore {
 	public function add_mention($mention) {
 		$file_path = APP_DATA_DIR . DIRECTORY_SEPARATOR . $mention->mentionId . ".json";
+		$mention->data['published'] = $mention->data['published'] ?? $mention->data['wm-received'];
 		file_put_contents(
 			$file_path, 
 			json_encode($mention->data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)