Index: src/wp-includes/js/media-editor.js
===================================================================
--- src/wp-includes/js/media-editor.js	(revision 34253)
+++ src/wp-includes/js/media-editor.js	(working copy)
@@ -670,6 +670,7 @@
 		 */
 		frame: function() {
 			if ( this._frame ) {
+				wp.media.frame = this._frame;
 				return this._frame;
 			}
 
@@ -1067,6 +1068,8 @@
 				workflow = this.add( id, options );
 			}
 
+			wp.media.frame = workflow;
+
 			return workflow.open();
 		},