diff --git a/ts/domtools.classes.keyboard.ts b/ts/domtools.classes.keyboard.ts
index db7bfcd..216cafc 100644
--- a/ts/domtools.classes.keyboard.ts
+++ b/ts/domtools.classes.keyboard.ts
@@ -144,6 +144,7 @@ export class Keyboard {
     combos.forEach((combo) => {
       this.registerComboCallback(combo, subject);
     });
+    return subject;
   }
 
   public startListening() {