diff --git a/src/calibre/utils/unsmarten.py b/src/calibre/utils/unsmarten.py
index 7944f710b0..6f0c2a19e1 100644
--- a/src/calibre/utils/unsmarten.py
+++ b/src/calibre/utils/unsmarten.py
@@ -36,8 +36,8 @@ _mreplace = MReplace({
         '‘':"'",
         '’':"'",
         '′':"'",
-}
-)
+})
+
 unsmarten_text = _mreplace.mreplace