diff --git a/sites/all/modules/field_validation/field_validation.admin.inc b/sites/all/modules/field_validation/field_validation.admin.inc
index a0c33d0..c3c8259 100644
--- a/sites/all/modules/field_validation/field_validation.admin.inc
+++ b/sites/all/modules/field_validation/field_validation.admin.inc
@@ -194,6 +194,7 @@ function field_validation_manage_rule($form, $form_state, $instance, $action = '
       'source' => array('rulename'),
     ),
     '#weight' => 2,
+    '#maxlength' => 32,
   );
   $field = field_info_field($instance['field_name']);
   $col_options = array(