diff --git a/satnav/satnav.d.ts b/satnav/satnav.d.ts
index a6eee950d..3ad690941 100644
--- a/satnav/satnav.d.ts
+++ b/satnav/satnav.d.ts
@@ -1,3 +1,8 @@
+// Type definitions for satnav
+// Project: https://github.com/f5io/satnav-js
+// Definitions by: Christian Holm Diget <https://github.com/DotNetNerd>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
 declare type Callback = () => void;
 
 interface ISatnavOptions {