Index: src/wp-includes/js/media-models.js
===================================================================
--- src/wp-includes/js/media-models.js	(revision 25047)
+++ src/wp-includes/js/media-models.js	(working copy)
@@ -693,7 +693,7 @@
 				});
 
 				// Clone the args so manipulation is non-destructive.
-				args = _.clone( this.args );
+				var args = _.clone( this.args );
 
 				// Determine which page to query.
 				if ( -1 !== args.posts_per_page )