diff --git wp-includes/class-wp-image-editor.php wp-includes/class-wp-image-editor.php
index 1d7b80e..085b468 100644
--- wp-includes/class-wp-image-editor.php
+++ wp-includes/class-wp-image-editor.php
@@ -333,7 +333,7 @@ abstract class WP_Image_Editor {
 		wp_mkdir_p( dirname( $dst_file ) );
 
 		if ( $stream = wp_is_stream( $filename ) ) {
-			$filename = null;
+			$arguments[1] = null;
 			ob_start();
 		}