diff --git a/src/Illuminate/Filesystem/functions.php b/src/Illuminate/Filesystem/functions.php
index a84dfb603c49..6ce25f632b93 100644
--- a/src/Illuminate/Filesystem/functions.php
+++ b/src/Illuminate/Filesystem/functions.php
@@ -7,7 +7,7 @@
      * Join the given paths together.
      *
      * @param  string|null  $basePath
-     * @param  string|null  ...$paths
+     * @param  string  ...$paths
      * @return string
      */
     function join_paths($basePath, ?string ...$paths)