diff --git a/homeassistant/components/sensor/folder.py b/homeassistant/components/sensor/folder.py
index a185cd1e825..2b5f3dd4309 100644
--- a/homeassistant/components/sensor/folder.py
+++ b/homeassistant/components/sensor/folder.py
@@ -38,7 +38,7 @@ def get_files_list(folder_path, filter_term):
 
 def get_size(files_list):
     """Return the sum of the size in bytes of files in the list."""
-    size_list = [os.stat(f).st_size for f in files_list]
+    size_list = [os.stat(f).st_size for f in files_list if os.path.isfile(f)]
     return sum(size_list)