diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index 0c04a27b1c3..4c3c558916f 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -4284,6 +4284,7 @@ declare namespace Intl {
         style?: string;
         currency?: string;
         currencyDisplay?: string;
+        currencySign?: string;
         useGrouping?: boolean;
         minimumIntegerDigits?: number;
         minimumFractionDigits?: number;
diff --git a/tests/baselines/reference/numberFormatCurrencySign.js b/tests/baselines/reference/numberFormatCurrencySign.js
new file mode 100644
index 00000000000..9f2482e2bff
--- /dev/null
+++ b/tests/baselines/reference/numberFormatCurrencySign.js
@@ -0,0 +1,6 @@
+//// [numberFormatCurrencySign.ts]
+const str = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999);
+
+
+//// [numberFormatCurrencySign.js]
+var str = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999);
diff --git a/tests/baselines/reference/numberFormatCurrencySign.symbols b/tests/baselines/reference/numberFormatCurrencySign.symbols
new file mode 100644
index 00000000000..3252448682c
--- /dev/null
+++ b/tests/baselines/reference/numberFormatCurrencySign.symbols
@@ -0,0 +1,12 @@
+=== tests/cases/compiler/numberFormatCurrencySign.ts ===
+const str = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999);
+>str : Symbol(str, Decl(numberFormatCurrencySign.ts, 0, 5))
+>new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format : Symbol(Intl.NumberFormat.format, Decl(lib.es5.d.ts, --, --))
+>Intl.NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
+>Intl : Symbol(Intl, Decl(lib.es5.d.ts, --, --))
+>NumberFormat : Symbol(Intl.NumberFormat, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
+>style : Symbol(style, Decl(numberFormatCurrencySign.ts, 0, 44))
+>currency : Symbol(currency, Decl(numberFormatCurrencySign.ts, 0, 63))
+>currencySign : Symbol(currencySign, Decl(numberFormatCurrencySign.ts, 0, 80))
+>format : Symbol(Intl.NumberFormat.format, Decl(lib.es5.d.ts, --, --))
+
diff --git a/tests/baselines/reference/numberFormatCurrencySign.types b/tests/baselines/reference/numberFormatCurrencySign.types
new file mode 100644
index 00000000000..343951cb8e9
--- /dev/null
+++ b/tests/baselines/reference/numberFormatCurrencySign.types
@@ -0,0 +1,20 @@
+=== tests/cases/compiler/numberFormatCurrencySign.ts ===
+const str = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999);
+>str : string
+>new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999) : string
+>new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format : (value: number) => string
+>new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }) : Intl.NumberFormat
+>Intl.NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>Intl : typeof Intl
+>NumberFormat : { (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; new (locales?: string | string[], options?: Intl.NumberFormatOptions): Intl.NumberFormat; supportedLocalesOf(locales: string | string[], options?: Intl.NumberFormatOptions): string[]; }
+>'en-NZ' : "en-NZ"
+>{ style: 'currency', currency: 'NZD', currencySign: 'accounting' } : { style: string; currency: string; currencySign: string; }
+>style : string
+>'currency' : "currency"
+>currency : string
+>'NZD' : "NZD"
+>currencySign : string
+>'accounting' : "accounting"
+>format : (value: number) => string
+>999999 : 999999
+
diff --git a/tests/cases/compiler/numberFormatCurrencySign.ts b/tests/cases/compiler/numberFormatCurrencySign.ts
new file mode 100644
index 00000000000..ee70de4a9b7
--- /dev/null
+++ b/tests/cases/compiler/numberFormatCurrencySign.ts
@@ -0,0 +1 @@
+const str = new Intl.NumberFormat('en-NZ', { style: 'currency', currency: 'NZD', currencySign: 'accounting' }).format(999999);