diff --git a/web/CXM_web_arg_utils.anubis b/web/CXM_web_arg_utils.anubis
index 8037ed2..3c37777 100644
--- a/web/CXM_web_arg_utils.anubis
+++ b/web/CXM_web_arg_utils.anubis
@@ -123,6 +123,20 @@ public define DB_id
   get_DB_id
   (
     List(Web_arg) lwa,
+    String        arg_name,
+    DB_id         defaut_value
+  ) =
+  if get_mb_DB_id(lwa, arg_name) is
+  {
+    failure         then defaut_value,
+    success(value)  then value
+  }
+.
+
+public define DB_id
+  get_DB_id
+  (
+    List(Web_arg) lwa,
     String        arg_name
   ) =
   if get_mb_DB_id(lwa, arg_name) is
--
libgit2 0.21.4