diff --git a/src/istio/control/http/attributes_builder.cc b/src/istio/control/http/attributes_builder.cc
index 4fc6e4e81c8..795b70b83e2 100644
--- a/src/istio/control/http/attributes_builder.cc
+++ b/src/istio/control/http/attributes_builder.cc
@@ -138,6 +138,7 @@ void AttributesBuilder::ExtractForwardedAttributes(CheckData *check_data) {
 
   static const std::set<std::string> kForwardWhitelist = {
       utils::AttributeName::kSourceUID,
+      utils::AttributeName::kSourceNamespace,
       utils::AttributeName::kDestinationServiceName,
       utils::AttributeName::kDestinationServiceUID,
       utils::AttributeName::kDestinationServiceHost,