diff --git a/web/controllers_web_site.anubis b/web/controllers_web_site.anubis
index 64c0028..0b744e3 100644
--- a/web/controllers_web_site.anubis
+++ b/web/controllers_web_site.anubis
@@ -404,7 +404,7 @@ define WEB_Page_Renderer
     (LogLevel, String) -> One   logger                 //logger
   )=
   //get the renderer page name to use from the session "AWS_PAGE_RENDERER"
-  if get_String(_session.fields, "AWS_CURRENT_PAGE_RENDERER") is
+  if get_mb_String(_session.fields, "AWS_CURRENT_PAGE_RENDERER") is
   {
     failure                 then logger(logWarning, "No renderer defined, use the default"); default_page_renderer,
     success(renderer_name)  then
--
libgit2 0.21.4