diff --git a/wp-includes/js/customize-controls.dev.js b/wp-includes/js/customize-controls.dev.js
index c61681091..2bd9b9c9d 100644
--- a/wp-includes/js/customize-controls.dev.js
+++ b/wp-includes/js/customize-controls.dev.js
@@ -559,6 +559,8 @@
 				control.element.set( 'blank' !== to );
 			});
 		});
+
+		api.trigger( 'ready' );
 	});
 
 })( wp, jQuery );
\ No newline at end of file