diff --git a/typings/xterm.d.ts b/typings/xterm.d.ts
index b1995bb2..6bfb71ae 100644
--- a/typings/xterm.d.ts
+++ b/typings/xterm.d.ts
@@ -713,7 +713,7 @@ declare module 'xterm' {
      * Adds an event listener for when the bell is triggered.
      * @returns an `IDisposable` to stop listening.
      */
-     onBell: IEvent<void>;
+    onBell: IEvent<void>;
 
     /**
      * Unfocus the terminal.