diff --git a/mautrix_telegram/formatter/from_telegram.py b/mautrix_telegram/formatter/from_telegram.py
index 57c3746d..435e3c85 100644
--- a/mautrix_telegram/formatter/from_telegram.py
+++ b/mautrix_telegram/formatter/from_telegram.py
@@ -280,8 +280,8 @@ async def _telegram_entities_to_matrix(
             html.append(entity_text)
         elif entity_type == ReuploadedCustomEmoji:
             html.append(
-                f'<img data-mx-emoticon src="{escape(entity.file.mxc)}" height="32" width="32" '
-                f'alt="{entity_text}" title="{entity_text}"/>'
+                f'<img data-mx-emoticon data-mau-animated-emoji src="{escape(entity.file.mxc)}" '
+                f'height="32" width="32" alt="{entity_text}" title="{entity_text}"/>'
             )
         elif entity_type in (
             MessageEntityBotCommand,