diff --git a/types/google-libphonenumber/index.d.ts b/types/google-libphonenumber/index.d.ts
index 9d87ca825c..0e410e121c 100644
--- a/types/google-libphonenumber/index.d.ts
+++ b/types/google-libphonenumber/index.d.ts
@@ -35,7 +35,7 @@ declare namespace libphonenumber {
         }
     }
 
-    export interface PhoneNumber {
+    export class PhoneNumber {
         getCountryCode(): number | undefined;
         getCountryCodeOrDefault(): number;
         setCountryCode(value: number): void;