diff --git a/types/dhtmlxscheduler/index.d.ts b/types/dhtmlxscheduler/index.d.ts
index 0395090d75..2a5ff01c87 100644
--- a/types/dhtmlxscheduler/index.d.ts
+++ b/types/dhtmlxscheduler/index.d.ts
@@ -1044,6 +1044,7 @@ interface SchedulerLocaleLabels {
 	confirm_deleting: string;
 	section_description: string;
 	section_time: string;
+	unit_tab: string;
 }
 
 interface SchedulerLocale {