diff --git a/src/mirror-img.lisp b/src/mirror-img.lisp
index 8dcd91c..2d1094b 100644
--- a/src/mirror-img.lisp
+++ b/src/mirror-img.lisp
@@ -139,8 +139,9 @@ already set)."
 (defun http-fetch (url path)
   "Download a URL to a path; if successful, returns the pathname. Otherwise, NIL."
   (handler-case
-      (and (dexador:fetch (url-encode-uri url) path)
-           (pathname path))
+      ; DEXADOR:FETCH returns nil on success, errors on fail. Hence the OR.
+      (or (dexador:fetch (url-encode-uri url) path)
+          (pathname path))
     (cl-user::file-exists ()
       path)
     (error nil)))