diff --git a/generated/filesystem.php b/generated/filesystem.php
index 5a39ede3..de30f3b5 100644
--- a/generated/filesystem.php
+++ b/generated/filesystem.php
@@ -1593,7 +1593,7 @@ function tmpfile()
  * @param string $filename The name of the file being touched.
  * @param int $mtime The touch time. If mtime is NULL,
  * the current system time is used.
- * @param int $atime If NULL, the access time of the given filename is set to
+ * @param int $atime If not NULL, the access time of the given filename is set to
  * the value of atime. Otherwise, it is set to
  * the value passed to the mtime parameter.
  * If both are NULL, the current system time is used.