diff --git a/glue_ar/qt/export_dialog.py b/glue_ar/qt/export_dialog.py
index dfb3d1a..c28301e 100644
--- a/glue_ar/qt/export_dialog.py
+++ b/glue_ar/qt/export_dialog.py
@@ -69,12 +69,15 @@ def _widgets_for_property(self,
             def update_label(value):
                 value_label.setText(f"{value:.{places}f}")
 
-            def remove_label_callback(*args):
-                remove_callback(instance, property, update_label)
+            def remove_label_callback(widget, update_label=update_label):
+                try:
+                    remove_callback(instance, property, update_label)
+                except ValueError:
+                    pass
 
             update_label(value)
             add_callback(instance, property, update_label)
-            widget.destroyed.connect(remove_label_callback)
+            widget.destroyed.connect(lambda *args, cb=remove_label_callback: cb(widget))
 
             steps = round((max - min) / step)
             widget.setMinimum(0)