diff --git a/include/class.forms.php b/include/class.forms.php
index 4a0f2f72efd4ce4d271dba003c24816f87e724f4..0b6da8f275f0f5a75fc08c3f618279bdd2aff058 100644
--- a/include/class.forms.php
+++ b/include/class.forms.php
@@ -3314,7 +3314,7 @@ class AssignmentForm extends Form {
                     'default'=>'',
                     'configuration' => array(
                         'html' => true,
-                        'size' => 'large',
+                        'size' => 'small',
                         'placeholder' => __('Optional reason for the assignment'),
                         ),
                     )