diff --git a/pyrogram/methods/messages/send_reaction.py b/pyrogram/methods/messages/send_reaction.py
index 1ede4ead..b1e6540b 100644
--- a/pyrogram/methods/messages/send_reaction.py
+++ b/pyrogram/methods/messages/send_reaction.py
@@ -63,7 +63,7 @@ class SendReaction:
             raw.functions.messages.SendReaction(
                 peer=await self.resolve_peer(chat_id),
                 msg_id=message_id,
-                reaction=emoji,
+                reaction=[raw.types.ReactionEmoji(emoticon=emoji)] if emoji else None,
                 big=big
             )
         )