diff --git a/client/src/telethon/_impl/client/parsers/html.py b/client/src/telethon/_impl/client/parsers/html.py
index 25b53cff..f3db23ba 100644
--- a/client/src/telethon/_impl/client/parsers/html.py
+++ b/client/src/telethon/_impl/client/parsers/html.py
@@ -48,7 +48,7 @@ class HTMLToTelegramParser(HTMLParser):
             EntityType = MessageEntityStrike
         elif tag == "blockquote":
             EntityType = MessageEntityBlockquote
-        elif tag == "spoiler":
+        elif tag == "spoiler" or tag == "tg-spoiler":
             EntityType = MessageEntitySpoiler
         elif tag == "code":
             try: