diff --git a/src/wp-admin/includes/ajax-actions.php b/src/wp-admin/includes/ajax-actions.php
index 85996d2676..16ce1093a4 100644
--- a/src/wp-admin/includes/ajax-actions.php
+++ b/src/wp-admin/includes/ajax-actions.php
@@ -2625,7 +2625,7 @@ function wp_ajax_image_editor() {
 	wp_image_editor( $attachment_id, $msg );
 	$html = ob_get_clean();
 
-	if ( $msg->error ) {
+	if ( isset( $msg->error ) ) {
 		wp_send_json_error(
 			array(
 				'message' => $msg,