diff --git a/glue_ar/qt/export_dialog.py b/glue_ar/qt/export_dialog.py
index 9df9275..931bba2 100644
--- a/glue_ar/qt/export_dialog.py
+++ b/glue_ar/qt/export_dialog.py
@@ -57,6 +57,7 @@ def _widgets_for_property(self,
             widget.setSizePolicy(policy)
 
             value_label = QLabel()
+
             def update_label(value):
                 value_label.setText(f"{value:g}")