diff --git a/src/wp-includes/deprecated.php b/src/wp-includes/deprecated.php
index 43cf743b77..2687137842 100644
--- a/src/wp-includes/deprecated.php
+++ b/src/wp-includes/deprecated.php
@@ -1916,13 +1916,11 @@ function get_attachment_icon_src( $id = 0, $fullsize = false ) {
 		// We have a thumbnail desired, specified and existing
 
 		$src_file = basename($src);
-		$class = 'attachmentthumb';
 	} elseif ( wp_attachment_is_image( $post->ID ) ) {
 		// We have an image without a thumbnail
 
 		$src = wp_get_attachment_url( $post->ID );
 		$src_file = & $file;
-		$class = 'attachmentimage';
 	} elseif ( $src = wp_mime_type_icon( $post->ID ) ) {
 		// No thumb, no image. We'll look for a mime-related icon instead.