diff --git a/types/node-polyglot/index.d.ts b/types/node-polyglot/index.d.ts
index 7587f77640..3133def496 100644
--- a/types/node-polyglot/index.d.ts
+++ b/types/node-polyglot/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for node-polyglot v0.4.1
+// Type definitions for node-polyglot v0.4.2
 // Project: https://github.com/airbnb/polyglot.js
 // Definitions by: Tim Jackson-Kiely <https://github.com/timjk>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -38,6 +38,8 @@ declare class Polyglot {
     locale(): string;
 
     locale(locale: string): void;
+
+    has(phrase: string): boolean;
 }
 
 export = Polyglot;
diff --git a/types/node-polyglot/node-polyglot-tests.ts b/types/node-polyglot/node-polyglot-tests.ts
index bfb18339c0..14efa8ad30 100644
--- a/types/node-polyglot/node-polyglot-tests.ts
+++ b/types/node-polyglot/node-polyglot-tests.ts
@@ -47,6 +47,9 @@ function translate(): void {
 		_: "I like to write in %{language}.",
 		language: "Javascript"
 	});
+  
+	polyglot.has("hello");
+	polyglot.has("world");
 
 	polyglot.replace({
 		"hello": "hey",