diff --git a/lang/en.yml b/lang/en.yml
index 4532366..650ad90 100644
--- a/lang/en.yml
+++ b/lang/en.yml
@@ -1,5 +1,6 @@
 en:
   SilverStripe\ErrorPage\ErrorPage:
+    CLASS_DESCRIPTION: 'Custom content for different error cases (e.g. "Page not found")'
     CODE: 'Error code'
     CODE_400: '400 - Bad Request'
     CODE_401: '401 - Unauthorized'
diff --git a/src/ErrorPage.php b/src/ErrorPage.php
index 7242f28..8000137 100644
--- a/src/ErrorPage.php
+++ b/src/ErrorPage.php
@@ -60,7 +60,7 @@ class ErrorPage extends Page
 
     private static $allowed_children = [];
 
-    private static $description = 'Custom content for different error cases (e.g. "Page not found")';
+    private static $class_description = 'Custom content for different error cases (e.g. "Page not found")';
 
     private static $icon_class = 'font-icon-p-error';