diff --git a/src/gluonts/mx/model/seq2seq/_mq_dnn_estimator.py b/src/gluonts/mx/model/seq2seq/_mq_dnn_estimator.py
index 7359beb3a7..5864d37931 100644
--- a/src/gluonts/mx/model/seq2seq/_mq_dnn_estimator.py
+++ b/src/gluonts/mx/model/seq2seq/_mq_dnn_estimator.py
@@ -317,7 +317,7 @@ def from_inputs(cls, train_iter, **params):
             if field in params.keys():
                 is_params_field = (
                     params[field]
-                    if type(params[field]) == bool
+                    if isinstance(params[field], bool)
                     else strtobool(params[field])
                 )
                 if is_params_field and not auto_params[field]: