diff --git a/modules/net-lb-app-int-cross-region/variables-backend-service.tf b/modules/net-lb-app-int-cross-region/variables-backend-service.tf
index b7a3066b30..0b92c7849d 100644
--- a/modules/net-lb-app-int-cross-region/variables-backend-service.tf
+++ b/modules/net-lb-app-int-cross-region/variables-backend-service.tf
@@ -109,7 +109,7 @@ variable "backend_service_configs" {
       for backend_service in values(var.backend_service_configs) : contains(
         [
           "NONE", "CLIENT_IP", "CLIENT_IP_NO_DESTINATION",
-          "CLIENT_IP_PORT_PROTO", "CLIENT_IP_PROTO"
+          "CLIENT_IP_PORT_PROTO", "CLIENT_IP_PROTO", "GENERATED_COOKIE", "HEADER_FIELD", "HTTP_COOKIE"
         ],
         coalesce(backend_service.session_affinity, "NONE")
       )