diff --git a/configure.php b/configure.php
index c18775d54e..d9937c9f2b 100755
--- a/configure.php
+++ b/configure.php
@@ -470,6 +470,7 @@ function find_xml_files($path) // {{{
 $ac['SRCDIR'] = $ac['srcdir'];
 $ac['WORKDIR'] = $ac['srcdir'];
 $ac['ROOTDIR'] = $ac['rootdir'];
+putenv("ROOTDIR={$ac['ROOTDIR']}");
 $ac['BASEDIR'] = $ac['basedir'];
 checkvalue($ac['srcdir']);