diff --git a/pytorch_lightning/models/trainer.py b/pytorch_lightning/models/trainer.py
index 059eb09abd..b6b241d72e 100644
--- a/pytorch_lightning/models/trainer.py
+++ b/pytorch_lightning/models/trainer.py
@@ -132,6 +132,7 @@ class Trainer(TrainerIO):
             'batch_nb':'{}'.format(self.batch_nb),
         }
         tqdm_dic.update(self.tqdm_metrics)
+
         return tqdm_dic
 
     def __layout_bookeeping(self, model):
@@ -161,6 +162,9 @@ class Trainer(TrainerIO):
 
     def __add_tqdm_metrics(self, metrics):
         for k, v in metrics.items():
+            if type(v) is torch.Tensor:
+                v = v.item()
+
             self.tqdm_metrics[k] = v
 
     def validate(self, model, dataloader, max_batches):