diff --git a/src/wp-includes/js/media-models.js b/src/wp-includes/js/media-models.js
index f501b69fc6..78489d0797 100644
--- a/src/wp-includes/js/media-models.js
+++ b/src/wp-includes/js/media-models.js
@@ -681,7 +681,7 @@ window.wp = window.wp || {};
 		},
 
 		sync: function( method, model, options ) {
-			var fallback;
+			var args, fallback;
 
 			// Overload the read method so Attachment.fetch() functions correctly.
 			if ( 'read' === method ) {