Index: src/wp-includes/post.php
===================================================================
--- src/wp-includes/post.php	(revision 46090)
+++ src/wp-includes/post.php	(working copy)
@@ -6782,9 +6782,9 @@
 	}
 
 	if ( get_option( 'default_pingback_flag' ) ) {
-		add_post_meta( $post_id, '_pingme', '1' );
+		add_post_meta( $post_id, '_pingme', '1', true );
 	}
-	add_post_meta( $post_id, '_encloseme', '1' );
+	add_post_meta( $post_id, '_encloseme', '1', true );
 
 	if ( ! wp_next_scheduled( 'do_pings' ) ) {
 		wp_schedule_single_event( time(), 'do_pings' );