diff --git a/maubot/matrix.py b/maubot/matrix.py
index 2864465..ef10e69 100644
--- a/maubot/matrix.py
+++ b/maubot/matrix.py
@@ -33,7 +33,7 @@ class HumanReadableString(MarkdownString):
 
 
 class MaubotHTMLParser(MatrixParser[HumanReadableString]):
-    e = HumanReadableString
+    fs = HumanReadableString
 
 
 def parse_formatted(message: str, allow_html: bool = False, render_markdown: bool = True