diff --git a/src/lib/es2020.intl.d.ts b/src/lib/es2020.intl.d.ts
index eb8ac542d8..bd65cfd54e 100644
--- a/src/lib/es2020.intl.d.ts
+++ b/src/lib/es2020.intl.d.ts
@@ -264,9 +264,13 @@ declare namespace Intl {
 
     interface NumberFormatOptions {
         notation?: string;
+        unit?: string;
+        unitDisplay?: string;
     }
 
     interface ResolvedNumberFormatOptions {
         notation?: string;
+        unit?: string;
+        unitDisplay?: string;
     }
 }
diff --git a/tests/lib/lib.d.ts b/tests/lib/lib.d.ts
index 5bbe688910..3fc9d1bd09 100644
--- a/tests/lib/lib.d.ts
+++ b/tests/lib/lib.d.ts
@@ -3892,6 +3892,8 @@ declare module Intl {
         style?: string;
         currency?: string;
         currencyDisplay?: string;
+        unit?: string;
+        unitDisplay?: string;
         useGrouping?: boolean;
         minimumIntegerDigits?: number;
         minimumFractionDigits?: number;
@@ -3907,6 +3909,8 @@ declare module Intl {
         style: string;
         currency?: string;
         currencyDisplay?: string;
+        unit?: string;
+        unitDisplay?: string;
         minimumIntegerDigits: number;
         minimumFractionDigits: number;
         maximumFractionDigits: number;