diff --git a/src/calibre/gui2/custom_column_widgets.py b/src/calibre/gui2/custom_column_widgets.py
index 55ae5aa860..07f01292fc 100644
--- a/src/calibre/gui2/custom_column_widgets.py
+++ b/src/calibre/gui2/custom_column_widgets.py
@@ -1042,7 +1042,7 @@ class BulkSeries(BulkBase):
             apply_changes = True
         elif self.main_widget.text():
             self.remove_series.setEnabled(False)
-            disable_numbering_checkboxes(idx_widget_enable=True)
+            self.idx_widget.setEnabled(True)
             apply_changes = True
         else:  # no text, no clear. Basically reinitialize
             self.main_widget.setEnabled(True)