diff --git a/src/wp-includes/class-wp-editor.php b/src/wp-includes/class-wp-editor.php
index 8812c770ab..914613508e 100644
--- a/src/wp-includes/class-wp-editor.php
+++ b/src/wp-includes/class-wp-editor.php
@@ -1679,7 +1679,7 @@ final class _WP_Editors {
 					if (
 						! init.wp_skip_init &&
 						( $wrap.hasClass( 'tmce-active' ) || ! tinyMCEPreInit.qtInit.hasOwnProperty( id ) ) &&
-						( readyState === 'complete' || ( ! inPostbox && readyState === 'interactive' ) )
+						( ( inPostbox && readyState === 'complete' ) || ( ! inPostbox && readyState === 'interactive' ) )
 					) {
 						tinymce.init( init );