diff --git a/docs/en/reference/attributes-reference.rst b/docs/en/reference/attributes-reference.rst
index 1f2fa339b9d..2054e31a5dc 100644
--- a/docs/en/reference/attributes-reference.rst
+++ b/docs/en/reference/attributes-reference.rst
@@ -575,7 +575,7 @@ Example with partial indexes:
 
     #[Index(name: "search_idx", columns: ["category"],
         options: [
-            "where": "((category IS NOT NULL))"
+            "where" => "((category IS NOT NULL))"
         ]
     )]
     class ECommerceProduct