diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index c6c4f02d3..d1f3db342 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -921,5 +921,9 @@ const LoginDialog = new Lang.Class({
     addCharacter: function(unichar) {
         this._authPrompt.addCharacter(unichar);
     },
+
+    finish: function(onComplete) {
+        this._authPrompt.finish(onComplete);
+    },
 });
 Signals.addSignalMethods(LoginDialog.prototype);