diff --git a/question/format/blackboard_six/format.php b/question/format/blackboard_six/format.php
index 3c5a28f54ce..ddacb205705 100644
--- a/question/format/blackboard_six/format.php
+++ b/question/format/blackboard_six/format.php
@@ -152,8 +152,7 @@ class qformat_blackboard_six extends qformat_blackboard_six_base {
                     }
                     if ($examfile->getAttribute('type') == 'assessment/x-bb-pool') {
                         if ($examfile->getAttribute('baseurl')) {
-                            $fileobj->filebase = clean_param($this->tempdir . '/'
-                                . $examfile->getAttribute('baseurl'), PARAM_SAFEPATH);
+                            $fileobj->filebase = $this->tempdir. '/' . $examfile->getAttribute('baseurl');
                         }
                         if ($content = $this->get_filecontent($examfile->getAttribute('file'))) {
                             $fileobj->filetype = self::FILETYPE_POOL;