diff --git a/packages/dart/npt_flutter/lib/util/form_validator.dart b/packages/dart/npt_flutter/lib/util/form_validator.dart
index 646781dd0..f4a909ee7 100644
--- a/packages/dart/npt_flutter/lib/util/form_validator.dart
+++ b/packages/dart/npt_flutter/lib/util/form_validator.dart
@@ -14,7 +14,7 @@ class FormValidator {
 
   static String? validateRequiredAtsignField(String? value) {
     final strings = AppLocalizations.of(App.navState.currentContext!)!;
-    if (!value!.startsWith('@')) {
+    if (!value!.startsWith('@') || value.length < 2) {
       return strings.validationErrorAtsignField;
     }
     validateRequiredField(value);