diff --git a/resources/lang/en-US/validation.php b/resources/lang/en-US/validation.php
index 99c847f589..f80dd70163 100644
--- a/resources/lang/en-US/validation.php
+++ b/resources/lang/en-US/validation.php
@@ -31,6 +31,7 @@ return [
         'numeric' => 'The :attribute field must be between :min and :max.',
         'string' => 'The :attribute field must be between :min and :max characters.',
     ],
+    'valid_regex' => 'The regular expression is invalid.',
     'boolean' => 'The :attribute field must be true or false.',
     'can' => 'The :attribute field contains an unauthorized value.',
     'confirmed' => 'The :attribute field confirmation does not match.',