diff --git a/examples/mnist_lightning.py b/examples/mnist_lightning.py
index 2155feb0..9313dbcd 100644
--- a/examples/mnist_lightning.py
+++ b/examples/mnist_lightning.py
@@ -100,7 +100,7 @@ def configure_optimizers(self):
 
         if self.enable_dp:
             self.trainer.fit_loop.setup_data()
-            dataloader = self.trainer.train_dataloader
+            data_loader = self.trainer.train_dataloader
 
             # transform (model, optimizer, dataloader) to DP-versions
             if hasattr(self, "dp"):