diff --git a/numbro.d.ts b/numbro.d.ts
index fe4fd027..db5a183d 100644
--- a/numbro.d.ts
+++ b/numbro.d.ts
@@ -62,7 +62,7 @@ declare namespace numbro {
         valueOf(): number;
     }
 
-    interface Format {
+    export interface Format {
         prefix?: number;
         postfix?: number;
         characteristic?: number;