--- libmariadb/libmariadb/mariadb_lib.c.orig	2018-08-30 11:28:43.886487068 +0100
+++ libmariadb/libmariadb/mariadb_lib.c	2018-08-30 11:27:58.819551110 +0100
@@ -1236,6 +1236,8 @@
 #endif
 
   /* Some empty-string-tests are done because of ODBC */
+  if (!host || !host[0])
+    host=mysql->options.host;
   if (!user || !user[0])
     user=mysql->options.user;
   if (!passwd)