diff --git a/pytorch_lightning/trainer/trainer.py b/pytorch_lightning/trainer/trainer.py
index 247510df..7cc786a7 100644
--- a/pytorch_lightning/trainer/trainer.py
+++ b/pytorch_lightning/trainer/trainer.py
@@ -470,7 +470,7 @@ class Trainer(TrainerIOMixin,
         if self.proc_rank == 0 and self.weights_summary is not None:
             if self.weights_summary in ['full', 'top']:
                 pass
-                # ref_model.summarize(mode=self.weights_summary)
+                ref_model.summarize(mode=self.weights_summary)
             else:
                 m = "weights_summary can be None, 'full' or 'top'"
                 raise MisconfigurationException(m)