diff --git a/td/generate/DoxygenTlDocumentationGenerator.php b/td/generate/DoxygenTlDocumentationGenerator.php
index afe94559f..4c84ea807 100644
--- a/td/generate/DoxygenTlDocumentationGenerator.php
+++ b/td/generate/DoxygenTlDocumentationGenerator.php
@@ -17,8 +17,9 @@ class DoxygenTlDocumentationGenerator extends TlDocumentationGenerator
             case 'double':
                 return 'double ';
             case 'string':
-            case 'bytes':
                 return 'std::string const &';
+            case 'bytes':
+                return 'bytes const &';
 
             default:
                 if (substr($type, 0, 6) === 'vector') {
@@ -74,8 +75,9 @@ class DoxygenTlDocumentationGenerator extends TlDocumentationGenerator
             case 'double':
                 return 'double';
             case 'string':
-            case 'bytes':
                 return 'std::string';
+            case 'bytes':
+                return 'bytes';
             case 'bool':
             case 'int':
             case 'long':
@@ -163,6 +165,13 @@ class DoxygenTlDocumentationGenerator extends TlDocumentationGenerator
  * Contains declarations of all functions and types which represent a public TDLib interface.
  */
 EOT
+);
+
+        $this->addDocumentation('using bytes = std::string;', <<<EOT
+/**
+ * This class is used to store arbitrary sequence of bytes.
+ */
+EOT
 );
 
         $this->addDocumentation('using BaseObject', <<<EOT
diff --git a/td/generate/tl_writer_cpp.cpp b/td/generate/tl_writer_cpp.cpp
index 2d77c0d07..abc468ff3 100644
--- a/td/generate/tl_writer_cpp.cpp
+++ b/td/generate/tl_writer_cpp.cpp
@@ -150,7 +150,7 @@ std::string TD_TL_writer_cpp::gen_fetch_class_name(const tl::tl_tree_type *tree_
     return "TlFetchString<" + string_type + ">";
   }
   if (name == "Bytes") {
-    return "TlFetchBytes<" + bytes_type + ">";
+    return "TlFetchBytes<bytes>";
   }
 
   if (name == "Vector") {
@@ -662,7 +662,7 @@ std::string TD_TL_writer_cpp::gen_constructor_field_init(int field_num, const st
   }
   std::string move_begin;
   std::string move_end;
-  if ((field_type == bytes_type || field_type.compare(0, 11, "std::vector") == 0 ||
+  if ((field_type == "bytes" || field_type.compare(0, 11, "std::vector") == 0 ||
        field_type.compare(0, 10, "object_ptr") == 0) &&
       !is_default) {
     move_begin = "std::move(";
diff --git a/td/generate/tl_writer_h.cpp b/td/generate/tl_writer_h.cpp
index 82880695c..d78f534e5 100644
--- a/td/generate/tl_writer_h.cpp
+++ b/td/generate/tl_writer_h.cpp
@@ -56,6 +56,10 @@ std::string TD_TL_writer_h::gen_output_begin() const {
          ext_forward_declaration + "namespace " + tl_name +
          " {\n\n"
 
+         "using bytes = " +
+         bytes_type +
+         ";\n\n"
+
          "using BaseObject = ::td::TlObject;\n\n"
 
          "template <class Type>\n"
diff --git a/td/generate/tl_writer_jni_cpp.cpp b/td/generate/tl_writer_jni_cpp.cpp
index cc7bee25e..edf7a5461 100644
--- a/td/generate/tl_writer_jni_cpp.cpp
+++ b/td/generate/tl_writer_jni_cpp.cpp
@@ -107,7 +107,7 @@ std::string TD_TL_writer_jni_cpp::gen_vector_fetch(std::string field_name, const
       template_type = gen_main_class_name(child->type);
     }
     template_type = "std::vector<" + template_type + ">";
-  } else if (vector_type == bytes_type) {
+  } else if (vector_type == "bytes") {
     std::fprintf(stderr, "Vector of Bytes is not supported\n");
     assert(false);
   } else {
@@ -262,7 +262,7 @@ std::string TD_TL_writer_jni_cpp::gen_vector_store(const std::string &field_name
            "env->DeleteLocalRef(arr_tmp_); "
            "} }";
   }
-  if (vector_type == bytes_type) {
+  if (vector_type == "bytes") {
     std::fprintf(stderr, "Vector of Bytes is not supported\n");
     assert(false);
   }
diff --git a/td/generate/tl_writer_jni_h.cpp b/td/generate/tl_writer_jni_h.cpp
index 0a56d298e..efbeacaf6 100644
--- a/td/generate/tl_writer_jni_h.cpp
+++ b/td/generate/tl_writer_jni_h.cpp
@@ -79,6 +79,10 @@ std::string TD_TL_writer_jni_h::gen_output_begin() const {
          tl_name +
          " {\n\n"
 
+         "using bytes = " +
+         bytes_type +
+         ";\n\n"
+
          "class " +
          gen_base_tl_class_name() +
          ";\n"
diff --git a/td/generate/tl_writer_td.cpp b/td/generate/tl_writer_td.cpp
index 0b2f64ff2..123e87080 100644
--- a/td/generate/tl_writer_td.cpp
+++ b/td/generate/tl_writer_td.cpp
@@ -188,7 +188,7 @@ std::string TD_TL_writer::gen_type_name(const tl::tl_tree_type *tree_type) const
     return "UInt256";
   }
   if (name == "Bytes") {
-    return bytes_type;
+    return "bytes";
   }
 
   if (name == "Vector") {
@@ -242,9 +242,10 @@ std::string TD_TL_writer::gen_constructor_parameter(int field_num, const std::st
   if (field_type == "bool " || field_type == "std::int32_t " || field_type == "std::int64_t " ||
       field_type == "double ") {
     res += field_type;
-  } else if (field_type == "UInt128 " || field_type == "UInt256 " || field_type == string_type + " ") {
+  } else if (field_type == "UInt128 " || field_type == "UInt256 " || field_type == string_type + " " ||
+             (string_type == bytes_type && field_type == "bytes ")) {
     res += field_type + "const &";
-  } else if (field_type.compare(0, 11, "std::vector") == 0 || field_type == bytes_type + " ") {
+  } else if (field_type.compare(0, 11, "std::vector") == 0 || field_type == "bytes ") {
     res += field_type + "&&";
   } else if (field_type.compare(0, 10, "object_ptr") == 0) {
     res += field_type + "&&";