diff --git a/src/wp-admin/js/customize-widgets.js b/src/wp-admin/js/customize-widgets.js
index 4aea3173fa..ab89adf84f 100644
--- a/src/wp-admin/js/customize-widgets.js
+++ b/src/wp-admin/js/customize-widgets.js
@@ -1852,12 +1852,7 @@
 			controlContainer.slideDown( function() {
 				if ( isExistingWidget ) {
 					widgetFormControl.updateWidget( {
-						instance: widgetFormControl.setting(),
-						complete: function( error ) {
-							if ( error ) {
-								throw error;
-							}
-						}
+						instance: widgetFormControl.setting()
 					} );
 				}
 			} );