diff --git a/database/db_types.anubis b/database/db_types.anubis
index 857ea4e..e421bbb 100644
--- a/database/db_types.anubis
+++ b/database/db_types.anubis
@@ -35,6 +35,17 @@ public define String
     none        then "none",
     db_id(_idx) then abs_to_decimal(_idx)
   }.
+
+public define Int
+  to_Int
+  (
+    DB_id idx
+  )=
+  if idx is
+  {
+    none        then (Int)-1,
+    db_id(_idx) then _idx
+  }.
   
 public define String
   to_String
--
libgit2 0.21.4