diff --git a/src/applications/maniphest/storage/ManiphestTransaction.php b/src/applications/maniphest/storage/ManiphestTransaction.php
--- a/src/applications/maniphest/storage/ManiphestTransaction.php
+++ b/src/applications/maniphest/storage/ManiphestTransaction.php
@@ -43,6 +43,18 @@
     return parent::shouldGenerateOldValue();
   }
 
+  public function getRemarkupBlocks() {
+    $blocks = parent::getRemarkupBlocks();
+
+    switch ($this->getTransactionType()) {
+      case self::TYPE_DESCRIPTION:
+        $blocks[] = $this->getNewValue();
+        break;
+    }
+
+    return $blocks;
+  }
+
   public function getRequiredHandlePHIDs() {
     $phids = parent::getRequiredHandlePHIDs();