diff --git a/res/cfg.json b/res/cfg.json
index 159e768..e53dd7f 100644
--- a/res/cfg.json
+++ b/res/cfg.json
@@ -103,7 +103,7 @@
                       "id": "submitButton",
                       "size": "md",
                       "block": false,
-                      "disabledOn": "freq === undefined || freq === ''",
+                      "disabledOn": "this.freq === undefined || this.freq === ''",
                       "onEvent": {
                         "click": {
                           "actions": [