diff --git a/src/calibre/ebooks/metadata/extz.py b/src/calibre/ebooks/metadata/extz.py
index 18c5a25671..6d41f7819d 100644
--- a/src/calibre/ebooks/metadata/extz.py
+++ b/src/calibre/ebooks/metadata/extz.py
@@ -83,7 +83,6 @@ def set_metadata(stream, mi):
     except:
         pass
 
-
 def get_first_opf_name(stream):
     with ZipFile(stream) as zf:
         names = zf.namelist()