diff --git a/chrome/content/zotero/xpcom/sync/syncLocal.js b/chrome/content/zotero/xpcom/sync/syncLocal.js
index a2df6ce3c..3c52132de 100644
--- a/chrome/content/zotero/xpcom/sync/syncLocal.js
+++ b/chrome/content/zotero/xpcom/sync/syncLocal.js
@@ -177,7 +177,7 @@ Zotero.Sync.Data.Local = {
 			loginManager.removeLogin(login);
 		}
 		// Remove the legacy pref
-		Zotero.Pref.clear('sync.server.username');
+		Zotero.Prefs.clear('sync.server.username');
 	},