diff --git a/ydb/library/yql/parser/proto_ast/org/antlr/codegen/templates/protobuf/protobuf.stg.in b/ydb/library/yql/parser/proto_ast/org/antlr/codegen/templates/protobuf/protobuf.stg.in
index c232db86dc95..06fb6a697da2 100644
--- a/ydb/library/yql/parser/proto_ast/org/antlr/codegen/templates/protobuf/protobuf.stg.in
+++ b/ydb/library/yql/parser/proto_ast/org/antlr/codegen/templates/protobuf/protobuf.stg.in
@@ -43,6 +43,7 @@ outputFile(LEXER,PARSER,TREE_PARSER, actionScope, actions,
 
 syntax = "proto3";
 option cc_enable_arenas = true;
+option optimize_for = CODE_SIZE;
 
 package @ANTLR_PACKAGE_NAME@;