diff --git a/lib/email-addresses.d.ts b/lib/email-addresses.d.ts
index 034d408..c8492a9 100644
--- a/lib/email-addresses.d.ts
+++ b/lib/email-addresses.d.ts
@@ -29,6 +29,7 @@ declare module emailAddresses {
         type: string;
         name: string;
         addresses: ParsedMailbox[];
+        domain: string;
     }
 
     interface ASTNode {