1 files changed, 1 insertions, 1 deletions
diff --git a/utils.lisp b/utils.lisp
index a576a12..74030b8 100644
--- a/utils.lisp
+++ b/utils.lisp
@@ -195,7 +195,7 @@ ELEMENT-TYPE as the stream's."
                       :younger-than (compute-script-last-modified-date))
     (apply #'%real-format-date
            destination date-control-string universal-time
-           (and time-zone-supplied-p time-zone))))
+           (and time-zone-supplied-p (list time-zone)))))
 
 
 (defun single-object (list &optional (errorp t))