diff --git a/priv/scrubbers/default.ex b/priv/scrubbers/default.ex
index dad9dc1a1..ece721ca8 100644
--- a/priv/scrubbers/default.ex
+++ b/priv/scrubbers/default.ex
@@ -23,7 +23,8 @@ defmodule Pleroma.HTML.Scrubber.Default do
     "mention",
     "u-url mention",
     "mention u-url",
-    "mention hashtag"
+    "mention hashtag",
+    "data-mfm"
   ])
 
   Meta.allow_tag_with_this_attribute_values(:a, "rel", [