diff --git a/src/modules/auth_db/doc/auth_db_admin.xml b/src/modules/auth_db/doc/auth_db_admin.xml
index d2349a5b5a5..3f96a1912f3 100644
--- a/src/modules/auth_db/doc/auth_db_admin.xml
+++ b/src/modules/auth_db/doc/auth_db_admin.xml
@@ -324,8 +324,9 @@ modparam("auth_db", "version_table", 0)
Negative codes may be interpreted as follows:
- -1 (generic error) - some generic error
- occurred and no reply was sent out;
+ -1 (generic error) - Bad credentials ,
+ couldn't parse credentials , no memory left , couldn't fetch from table ,
+ couldn't get realm or some generic error occurred and no reply was sent out;
-2 (invalid password) - wrong password;