diff --git a/docs/api.rst b/docs/api.rst
index 64de819d2..899406c5e 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -1924,6 +1924,8 @@ of :class:`enum.Enum`.
 
         The system message sent when a poll has closed.
 
+        .. versionadded:: 2.5
+
     .. attribute:: emoji_added
 
         The system message sent when a custom emoji is added to the guild.