diff --git a/src/MediaCollections/Models/Media.php b/src/MediaCollections/Models/Media.php
index 3596b3138..132b65812 100644
--- a/src/MediaCollections/Models/Media.php
+++ b/src/MediaCollections/Models/Media.php
@@ -441,7 +441,7 @@ public function mailAttachment(string $conversion = ''): Attachment
         $attachment = Attachment::fromStorageDisk($this->disk, $this->getPathRelativeToRoot($conversion))->as($this->file_name);
 
         if ($this->mime_type) {
-            $attachment->withMime($this->mime);
+            $attachment->withMime($this->mime_type);
         }
 
         return $attachment;