diff --git a/src/calibre/gui2/custom_column_widgets.py b/src/calibre/gui2/custom_column_widgets.py
index 2d60470268..8af25cd673 100644
--- a/src/calibre/gui2/custom_column_widgets.py
+++ b/src/calibre/gui2/custom_column_widgets.py
@@ -731,7 +731,8 @@ def populate_metadata_page(layout, db, book_id, bulk=False, two_column=False, pa
     count = len(cols)
     layout_rows_for_comments = 9
     if two_column:
-        turnover_point = ((count-comments_not_in_tweak+1) + int(comments_in_tweak*(layout_rows_for_comments-1))/2)
+        turnover_point = int(((count - comments_not_in_tweak + 1) +
+                                int(comments_in_tweak*(layout_rows_for_comments-1)))/2)
     else:
         # Avoid problems with multi-line widgets
         turnover_point = count + 1000