diff --git a/telethon_generator/data/errors.csv b/telethon_generator/data/errors.csv
index c96ae45a..027c56d6 100644
--- a/telethon_generator/data/errors.csv
+++ b/telethon_generator/data/errors.csv
@@ -280,6 +280,7 @@ POLL_OPTION_INVALID,400,A poll option used invalid data (the data may be too lon
 POLL_QUESTION_INVALID,400,The poll question was either empty or too long
 POLL_UNSUPPORTED,400,This layer does not support polls in the issued method
 POLL_VOTE_REQUIRED,403,
+POSTPONED_TIMEOUT,500,The postponed call has timed out
 PREVIOUS_CHAT_IMPORT_ACTIVE_WAIT_XMIN,406,"Similar to a flood wait, must wait {minutes} minutes"
 PRIVACY_KEY_INVALID,400,The privacy key is invalid
 PRIVACY_TOO_LONG,400,Cannot add that many entities in a single request