diff --git a/cache/stores/file/addinstanceform.php b/cache/stores/file/addinstanceform.php
index 0533ff34da8..a2f3c3a9d46 100644
--- a/cache/stores/file/addinstanceform.php
+++ b/cache/stores/file/addinstanceform.php
@@ -43,7 +43,7 @@ class cachestore_file_addinstance_form extends cachestore_addinstance_form {
         $form = $this->_form;
 
         $form->addElement('text', 'path', get_string('path', 'cachestore_file'));
-        $form->setType('path', PARAM_SAFEPATH);
+        $form->setType('path', PARAM_RAW);
         $form->addHelpButton('path', 'path', 'cachestore_file');
 
         $form->addElement('checkbox', 'autocreate', get_string('autocreate', 'cachestore_file'));