diff --git a/types/default-gateway/index.d.ts b/types/default-gateway/index.d.ts
index 23625451c3..20fbf52bd3 100644
--- a/types/default-gateway/index.d.ts
+++ b/types/default-gateway/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for default-gateway 3.0
 // Project: https://github.com/silverwind/default-gateway#readme
 // Definitions by: BendingBender <https://github.com/BendingBender>
+//                 Michele Della Mea <https://github.com/ArcaneDiver>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 export const v4: DefaultGatewayFn;
@@ -13,5 +14,5 @@ export interface DefaultGatewayFn {
 
 export interface Gateway {
     gateway: string;
-    interface: string | null;
+    interface: string;
 }