diff --git a/utils.go b/utils.go
index 536d440..7a411ae 100644
--- a/utils.go
+++ b/utils.go
@@ -19,7 +19,7 @@ func logOnError(err error, msg string) {
 	}
 }
 
-func unmarshalCallbackQueryPayload(rawMsg *json.RawMessage) (tdlib.CallbackQueryPayload, error) {
+func unmarshalCallbackQueryPayload(rawMsg []byte) (tdlib.CallbackQueryPayload, error) {
 
 	if rawMsg == nil {
 		return nil, nil
@@ -32,12 +32,12 @@ func unmarshalCallbackQueryPayload(rawMsg *json.RawMessage) (tdlib.CallbackQuery
 
 	switch tdlib.CallbackQueryPayloadEnum(objMap["@type"].(string)) {
 	case tdlib.CallbackQueryPayloadDataType:
-		var callbackQueryPayloadData CallbackQueryPayloadData
+		var callbackQueryPayloadData tdlib.CallbackQueryPayloadData
 		err := json.Unmarshal(*rawMsg, &callbackQueryPayloadData)
 		return &callbackQueryPayloadData, err
 
 	case tdlib.CallbackQueryPayloadGameType:
-		var callbackQueryPayloadGame CallbackQueryPayloadGame
+		var callbackQueryPayloadGame tdlib.CallbackQueryPayloadGame
 		err := json.Unmarshal(*rawMsg, &callbackQueryPayloadGame)
 		return &callbackQueryPayloadGame, err