diff --git a/src/Object/Post.php b/src/Object/Post.php
index 6973fd236a..ba8c709de8 100644
--- a/src/Object/Post.php
+++ b/src/Object/Post.php
@@ -887,8 +887,13 @@ class Post
 
 		$terms = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
 		foreach ($terms as $term) {
+			if (!$term['url']) {
+				DI::logger()->warning('Mention term with no URL', ['term' => $term]);
+				continue;
+			}
+
 			$profile = Contact::getByURL($term['url'], false, ['addr', 'contact-type']);
-			if (!empty($profile['addr']) && ((($profile['contact-type'] ?? '') ?: Contact::TYPE_UNKNOWN) != Contact::TYPE_COMMUNITY) &&
+			if (!empty($profile['addr']) && (($profile['contact-type'] ?? Contact::TYPE_UNKNOWN) != Contact::TYPE_COMMUNITY) &&
 				($profile['addr'] != $owner['addr']) && !strstr($text, $profile['addr'])) {
 				$text .= '@' . $profile['addr'] . ' ';
 			}