diff --git a/changelog.d/scrubbers-allow-mention-hashtag.add b/changelog.d/scrubbers-allow-mention-hashtag.add
new file mode 100644
index 000000000..c12ab1ffb
--- /dev/null
+++ b/changelog.d/scrubbers-allow-mention-hashtag.add
@@ -0,0 +1 @@
+scrubbers/default: Allow "mention hashtag" classes used by Mastodon
\ No newline at end of file
diff --git a/priv/scrubbers/default.ex b/priv/scrubbers/default.ex
index a75a6465d..dad9dc1a1 100644
--- a/priv/scrubbers/default.ex
+++ b/priv/scrubbers/default.ex
@@ -22,7 +22,8 @@ defmodule Pleroma.HTML.Scrubber.Default do
     "u-url",
     "mention",
     "u-url mention",
-    "mention u-url"
+    "mention u-url",
+    "mention hashtag"
   ])
 
   Meta.allow_tag_with_this_attribute_values(:a, "rel", [
diff --git a/priv/scrubbers/twitter_text.ex b/priv/scrubbers/twitter_text.ex
index 6e23b3efb..4df840735 100644
--- a/priv/scrubbers/twitter_text.ex
+++ b/priv/scrubbers/twitter_text.ex
@@ -23,7 +23,8 @@ defmodule Pleroma.HTML.Scrubber.TwitterText do
     "u-url",
     "mention",
     "u-url mention",
-    "mention u-url"
+    "mention u-url",
+    "mention hashtag"
   ])
 
   Meta.allow_tag_with_this_attribute_values(:a, "rel", [