diff --git a/types/typography/index.d.ts b/types/typography/index.d.ts
index 457d2f4b45..75b70dced6 100644
--- a/types/typography/index.d.ts
+++ b/types/typography/index.d.ts
@@ -2,10 +2,11 @@
 // Project: https://github.com/KyleAMathews/typography.js
 // Definitions by: Boye <https://github.com/boyeborg>
 //                 Krzysztof Żuraw <https://github.com/krzysztofzuraw>
+//                 Dominic Fallows <https://github.com/dominicfallows>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
-interface BaseLine {
+export interface BaseLine {
     fontSize: string;
     lineHeight: string;
 }