diff --git a/lib/setup.php b/lib/setup.php
index 995039bd48d..62d51c86a2c 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -27,7 +27,7 @@
     if (!isset($CFG->prefix)) {   // Just in case it isn't defined in config.php
         $CFG->prefix = "";
     }
-    $CFG->prefix = "$CFG->dbname.$CFG->prefix";
+    //$CFG->prefix = "$CFG->dbname.$CFG->prefix";