diff --git a/app/Presenters/AssetPresenter.php b/app/Presenters/AssetPresenter.php
index 689a87201a..144ed4d75b 100644
--- a/app/Presenters/AssetPresenter.php
+++ b/app/Presenters/AssetPresenter.php
@@ -492,9 +492,13 @@ class AssetPresenter extends Presenter
      */
     public function warrantee_expires()
     {
-        $date = date_create($this->purchase_date);
-        date_add($date, date_interval_create_from_date_string($this->warranty_months . ' months'));
-        return date_format($date, 'Y-m-d');
+        if (($this->purchase_date) && ($this->warranty_months)) {
+            $date = date_create($this->purchase_date);
+            date_add($date, date_interval_create_from_date_string($this->warranty_months . ' months'));
+            return date_format($date, 'Y-m-d');
+        }
+
+        return false;
     }
 
     /**