diff --git a/pytorch_lightning/root_module/model_saving.py b/pytorch_lightning/root_module/model_saving.py
index f9cd7f7f..9838ae55 100644
--- a/pytorch_lightning/root_module/model_saving.py
+++ b/pytorch_lightning/root_module/model_saving.py
@@ -130,7 +130,7 @@ class TrainerIO(object):
 
     def max_ckpt_in_folder(self, path):
         files = os.listdir(path)
-        files = [x for x if 'ckpt_' in x]
+        files = [x for x in files if 'ckpt_' in x]
         if len(files) == 0:
             return 0