diff --git textile.module textile.module
index 8b9c50b..6dd70bf 100644
--- textile.module
+++ textile.module
@@ -56,7 +56,7 @@ function textile_library_path() {
   foreach ($dirs as $dir) {
     $bool = (
       is_dir(DRUPAL_ROOT . '/' . $dir) &&
-      file_exists(DRUPAL_ROOT . "$dir/classTextile.php") &&
+      file_exists(DRUPAL_ROOT . "/$dir/classTextile.php") &&
       is_file(DRUPAL_ROOT . "/$dir/classTextile.php")
     );
     if ($bool) {