diff --git a/types/office-runtime/index.d.ts b/types/office-runtime/index.d.ts
index 74cb1179a3..bb0d779b11 100644
--- a/types/office-runtime/index.d.ts
+++ b/types/office-runtime/index.d.ts
@@ -79,7 +79,7 @@ declare namespace OfficeRuntime {
        */
       close(): Promise<void>;
     }
-  
+
        /*
        * Provides options for how a dialog is displayed.
        */
@@ -113,6 +113,6 @@ declare namespace OfficeRuntime {
        * @beta
        * Callback that is run when the dialog box sends an error.
        */
-      onMessage?(message: string, dialog?: Dialog): void
+      onMessage?(message: string, dialog?: Dialog): void;
     }
   }