diff --git a/docs/custom-template-tags-and-filters.rst b/docs/custom-template-tags-and-filters.rst
index a9d6819..2ec7e5a 100644
--- a/docs/custom-template-tags-and-filters.rst
+++ b/docs/custom-template-tags-and-filters.rst
@@ -42,7 +42,7 @@ Registering custom filters with arguments:
       }
 
       if let value = value as? Int {
-        return value * 2
+        return value * amount
       }
 
       return value