diff --git a/src/Factory/Api/Mastodon/Attachment.php b/src/Factory/Api/Mastodon/Attachment.php
index afc2f7c271..6f881808ec 100644
--- a/src/Factory/Api/Mastodon/Attachment.php
+++ b/src/Factory/Api/Mastodon/Attachment.php
@@ -136,7 +136,7 @@ class Attachment extends BaseFactory
 		$url = $this->baseUrl . '/photo/' . $photo['resource-id'] . '-0.' . $ext;
 
 		$preview = Photo::selectFirst(['scale'], ["`resource-id` = ? AND `uid` = ? AND `scale` > ?", $photo['resource-id'], $photo['uid'], 0], ['order' => ['scale']]);
-		if (empty($scale)) {
+		if (!empty($preview)) {
 			$preview_url = $this->baseUrl . '/photo/' . $photo['resource-id'] . '-' . $preview['scale'] . '.' . $ext;
 		} else {
 			$preview_url = '';
diff --git a/src/Navigation/Notifications/Repository/Notify.php b/src/Navigation/Notifications/Repository/Notify.php
index d1256f7d9f..8bfdfbe9a0 100644
--- a/src/Navigation/Notifications/Repository/Notify.php
+++ b/src/Navigation/Notifications/Repository/Notify.php
@@ -785,7 +785,7 @@ class Notify extends BaseRepository
 			$params['type'] = Model\Notification\Type::COMMENT;
 			$subject        = $l10n->t('%1$s Comment to conversation #%2$d by %3$s', $subjectPrefix, $item['parent'], $contact['name']);
 
-			if ($params['verb'] = Activity::LIKE) {
+			if ($params['verb'] == Activity::LIKE) {
 				switch ($Notification->type) {
 					case Model\Post\UserNotification::TYPE_DIRECT_COMMENT:
 						$subject = $l10n->t('%1$s %2$s liked your post #%3$d', $subjectPrefix, $contact['name'], $item['parent']);