diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php
@@ -32,7 +32,9 @@
 
     $viewer = $this->getViewer();
     return PhabricatorMarkupEngine::renderOneObject(
-      id(new PhabricatorMarkupOneOff())->setContent($value),
+      id(new PhabricatorMarkupOneOff())
+        ->setContent($value)
+        ->setPReserveLinebreaks(true),
       'default',
       $viewer);
   }