diff --git a/pytorch_lightning/logging/mlflow.py b/pytorch_lightning/logging/mlflow.py
index 6dd77d5d..50f4843e 100644
--- a/pytorch_lightning/logging/mlflow.py
+++ b/pytorch_lightning/logging/mlflow.py
@@ -46,7 +46,7 @@ class MLFlowLogger(LightningLoggerBase):
         Args:
             experiment_name (str): The name of the experiment
             tracking_uri (str): where this should track
-            tags (dict): ?
+            tags (dict): todo this param
         """
         super().__init__()
         self._mlflow_client = mlflow.tracking.MlflowClient(tracking_uri)