diff --git a/libraries/export/ods.php b/libraries/export/ods.php
index 75a747368..65d0126ff 100644
--- a/libraries/export/ods.php
+++ b/libraries/export/ods.php
@@ -60,7 +60,7 @@ function PMA_exportFooter() {
  * @access  public
  */
 function PMA_exportHeader() {
-    $GLOBALS['odt_buffer'] .= '<?xml version="1.0" encoding="' . $GLOBALS['charset'] . '"?' . '>'
+    $GLOBALS['ods_buffer'] .= '<?xml version="1.0" encoding="' . $GLOBALS['charset'] . '"?' . '>'
         . '<office:document-content '
             . 'xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" '
             . 'xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" '