diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index b3e32a670..4a7bc5a4c 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -913,6 +913,7 @@ var LoginDialog = GObject.registerClass({
     }
 
     _askForUsernameAndBeginVerification() {
+        this._authPrompt.setUser(null);
         this._authPrompt.setQuestion(_("Username: "));
 
         this._showRealmLoginHint(this._realmManager.loginFormat);