diff --git a/telethon_generator/data/errors.csv b/telethon_generator/data/errors.csv
index b47a864c..c3b9125c 100644
--- a/telethon_generator/data/errors.csv
+++ b/telethon_generator/data/errors.csv
@@ -144,7 +144,7 @@ GRAPH_OUTDATED_RELOAD,400,"Data can't be used for the channel statistics, graphs
 GROUPCALL_FORBIDDEN,403,
 GROUPCALL_JOIN_MISSING,400,
 GROUPCALL_SSRC_DUPLICATE_MUCH,400,
-GROUPCALL_NOT_MODIFIED,400
+GROUPCALL_NOT_MODIFIED,400,
 GROUPED_MEDIA_INVALID,400,Invalid grouped media
 GROUP_CALL_INVALID,400,Group call invalid
 HASH_INVALID,400,The provided hash is invalid