diff --git a/td/generate/scheme/mtproto_api.tl b/td/generate/scheme/mtproto_api.tl
index fdfe78d8f..e3603d809 100644
--- a/td/generate/scheme/mtproto_api.tl
+++ b/td/generate/scheme/mtproto_api.tl
@@ -15,7 +15,6 @@ resPQ#05162463 nonce:int128 server_nonce:int128 pq:string server_public_key_fing
 p_q_inner_data_dc#a9f55f95 pq:string p:string q:string nonce:int128 server_nonce:int128 new_nonce:int256 dc:int = P_Q_inner_data;
 p_q_inner_data_temp_dc#56fddf88 pq:string p:string q:string nonce:int128 server_nonce:int128 new_nonce:int256 dc:int expires_in:int = P_Q_inner_data;
 
-server_DH_params_fail#79cb045d nonce:int128 server_nonce:int128 new_nonce_hash:int128 = Server_DH_Params;
 server_DH_params_ok#d0e8075c nonce:int128 server_nonce:int128 encrypted_answer:string = Server_DH_Params;
 
 server_DH_inner_data#b5890dba nonce:int128 server_nonce:int128 g:int dh_prime:string g_a:string server_time:int = Server_DH_inner_data;
diff --git a/td/mtproto/Handshake.cpp b/td/mtproto/Handshake.cpp
index df41f1128..f772e8a08 100644
--- a/td/mtproto/Handshake.cpp
+++ b/td/mtproto/Handshake.cpp
@@ -139,17 +139,7 @@ Status AuthKeyHandshake::on_res_pq(Slice message, Callback *connection, PublicRs
 }
 
 Status AuthKeyHandshake::on_server_dh_params(Slice message, Callback *connection, DhCallback *dh_callback) {
-  TRY_RESULT(server_dh_params, fetch_result<mtproto_api::req_DH_params>(message, false));
-  switch (server_dh_params->get_id()) {
-    case mtproto_api::server_DH_params_ok::ID:
-      break;
-    case mtproto_api::server_DH_params_fail::ID:
-      return Status::Error("Server dh params fail");
-    default:
-      return Status::Error("Unknown result");
-  }
-
-  auto dh_params = move_tl_object_as<mtproto_api::server_DH_params_ok>(server_dh_params);
+  TRY_RESULT(dh_params, fetch_result<mtproto_api::req_DH_params>(message, false));
 
   // server_DH_params_ok#d0e8075c nonce:int128 server_nonce:int128 encrypted_answer:string = Server_DH_Params;
   if (dh_params->nonce_ != nonce) {