diff --git a/compiler/errors/source/400_BAD_REQUEST.tsv b/compiler/errors/source/400_BAD_REQUEST.tsv
index 1ad4c6a5..52d229ec 100644
--- a/compiler/errors/source/400_BAD_REQUEST.tsv
+++ b/compiler/errors/source/400_BAD_REQUEST.tsv
@@ -355,3 +355,4 @@ WEBPAGE_CURL_FAILED	Telegram server could not fetch the provided URL
 WEBPAGE_MEDIA_EMPTY	The URL doesn't contain any valid media
 YOU_BLOCKED_USER	You blocked this user
 ENTITY_BOUNDS_INVALID	The message entity bounds are invalid
+BOT_ONESIDE_NOT_AVAIL	Bots can't pin messages for one side only in private chats