diff --git a/src/js/adminAdapters.js b/src/js/adminAdapters.js
index 08f243f..07e87dd 100644
--- a/src/js/adminAdapters.js
+++ b/src/js/adminAdapters.js
@@ -408,6 +408,8 @@ function Adapters(main) {
                     var url;
                     var debug;
                     var adapter;
+                    var username;
+                    var password;
                     if (isCustom) {
                         url     = that.$installDialog.find('#install-url-link').val();