diff --git a/ydb/library/yql/providers/generic/connector/api/common/data_source.proto b/ydb/library/yql/providers/generic/connector/api/common/data_source.proto
index 34888c87ea4c..b29eb7e16a08 100644
--- a/ydb/library/yql/providers/generic/connector/api/common/data_source.proto
+++ b/ydb/library/yql/providers/generic/connector/api/common/data_source.proto
@@ -25,6 +25,7 @@ enum EDataSourceKind {
     CLICKHOUSE = 1;
     POSTGRESQL = 2;
     S3 = 3;
+    YDB = 4;
 }
 
 // EProtocol generalizes various kinds of network protocols supported by different databases.