diff --git a/src/public/app/services/mac_init.js b/src/public/app/services/mac_init.ts
similarity index 96%
rename from src/public/app/services/mac_init.js
rename to src/public/app/services/mac_init.ts
index 10fba8cbb..259b412f1 100644
--- a/src/public/app/services/mac_init.js
+++ b/src/public/app/services/mac_init.ts
@@ -15,7 +15,7 @@ function init() {
     }
 }
 
-function exec(cmd) {
+function exec(cmd: string) {
     document.execCommand(cmd);
 
     return false;