diff --git a/bootstrap-datepicker/bootstrap-datepicker.d.ts b/bootstrap-datepicker/bootstrap-datepicker.d.ts
index 1a2bb2124b..007f812c03 100644
--- a/bootstrap-datepicker/bootstrap-datepicker.d.ts
+++ b/bootstrap-datepicker/bootstrap-datepicker.d.ts
@@ -36,6 +36,7 @@ interface DatepickerOptions {
     multidateSeparator?: string;
     orientation?: string;
     assumeNearbyYear?: any;
+    viewMode?: string;
 }
 
 interface DatepickerCustomFormatOptions {