diff --git a/interface.lisp b/interface.lisp
index f107be0..486f28e 100644
--- a/interface.lisp
+++ b/interface.lisp
@@ -391,7 +391,7 @@ constraint."
                                    :metadata metadata
                                    :amz-headers
                                    (append policy-header
-					   (list (cons "storage-class" storage-class))
+                                           (list (cons "storage-class" storage-class))
                                            (when security-token
                                              (list (cons "security-token" security-token)))
                                            (when tagging