diff --git a/wp-includes/js/media-views.js b/wp-includes/js/media-views.js
index 8594f0738a..5d8cee5735 100644
--- a/wp-includes/js/media-views.js
+++ b/wp-includes/js/media-views.js
@@ -556,7 +556,7 @@
 		},
 
 		reset: function() {
-			_.each( _.without( _.keys( this.attributes ), _.keys( this.defaults ) ), function( key ) {
+			_.each( _.difference( _.keys( this.attributes ), _.keys( this.defaults ) ), function( key ) {
 				this.unset( key );
 			}, this );