diff --git a/ui/dialogs/dialogs.d.ts b/ui/dialogs/dialogs.d.ts
index cfa5bdedc..1c6a229ef 100644
--- a/ui/dialogs/dialogs.d.ts
+++ b/ui/dialogs/dialogs.d.ts
@@ -28,7 +28,7 @@
     * The prompt() method displays a dialog box that prompts the visitor for input.
     * @param text The text to display in the dialog box.
     */
-    function prompt(text: string, defaultText?: string): promises.Promise<string>;
+    function prompt(text: string): promises.Promise<string>;
 
     /**
     * The prompt() method displays a dialog box that prompts the visitor for input.