diff --git a/types/decimal.js/index.d.ts b/types/decimal.js/index.d.ts
index 16f7839448..69521a46cc 100644
--- a/types/decimal.js/index.d.ts
+++ b/types/decimal.js/index.d.ts
@@ -189,6 +189,8 @@ declare namespace decimal {
     }
 
     interface IDecimalStatic extends IDecimalConfig {
+        default: IDecimalStatic;
+
         (value: number | string | Decimal, base?: number): Decimal;
 
         new(value: number | string | Decimal, base?: number): Decimal;