diff --git a/wp-admin/includes/class-wp-comments-list-table.php b/wp-admin/includes/class-wp-comments-list-table.php
index 65fb5ba889..7a2920863f 100644
--- a/wp-admin/includes/class-wp-comments-list-table.php
+++ b/wp-admin/includes/class-wp-comments-list-table.php
@@ -302,8 +302,7 @@ class WP_Comments_List_Table extends WP_List_Table {
 	}
 
 	function single_row( $a_comment ) {
-		global $comment;
-		$post = get_post();
+		global $post, $comment;
 
 		$comment = $a_comment;
 		$the_comment_class = join( ' ', get_comment_class( wp_get_comment_status( $comment->comment_ID ) ) );
diff --git a/wp-admin/includes/class-wp-media-list-table.php b/wp-admin/includes/class-wp-media-list-table.php
index 96fe45d6b7..2f959b8dd4 100644
--- a/wp-admin/includes/class-wp-media-list-table.php
+++ b/wp-admin/includes/class-wp-media-list-table.php
@@ -156,8 +156,7 @@ class WP_Media_List_Table extends WP_List_Table {
 	}
 
 	function display_rows() {
-		$post = get_post();
-		$id = $post->ID;
+		global $post, $id;
 
 		add_filter( 'the_title','esc_html' );
 		$alt = '';