diff --git a/lib/setup.php b/lib/setup.php
index 05bb3812de98f..1dfa338ecbda6 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -155,6 +155,8 @@
         echo '</td></tr></table>';
         echo '</body></html>';
 
+        error_log('ADODB Error: '.$db->ErrorMsg()); // see MDL-14628
+
         if (empty($CFG->noemailever) and !empty($CFG->emailconnectionerrorsto)) {
             mail($CFG->emailconnectionerrorsto, 
                  'WARNING: Database connection error: '.$CFG->wwwroot,