diff --git a/autoload/startify/fortune.vim b/autoload/startify/fortune.vim
index 00c9feb..3fb9a64 100644
--- a/autoload/startify/fortune.vim
+++ b/autoload/startify/fortune.vim
@@ -157,9 +157,9 @@ function! startify#fortune#quote() abort
 endfunction
 
 " Function: #boxed {{{1
-function! startify#fortune#boxed() abort
+function! startify#fortune#boxed(...) abort
   let wrapped_quote = []
-  let quote = startify#fortune#quote()
+  let quote = a:0 && type(a:1) == type([]) ? a:1 : startify#fortune#quote()
   for line in quote
     let wrapped_quote += split(line, '\%50c.\{-}\zs\s', 1)
   endfor
diff --git a/doc/startify.txt b/doc/startify.txt
index 1ed5a98..f32bc38 100644
--- a/doc/startify.txt
+++ b/doc/startify.txt
@@ -542,9 +542,9 @@ Dynamic example:~
 <
 If you go for a dynamic header, you might find the following functions useful:
 
-    startify#fortune#quote()    raw random quote
-    startify#fortune#boxed()    formatted random quote in a box
-    startify#fortune#cowsay()   formatted random quote in a box + cow
+    startify#fortune#quote()     raw random quote
+    startify#fortune#boxed(...)  opt list or formatted random quote in a box
+    startify#fortune#cowsay()    formatted random quote in a box + cow
 
 Try them like this:
 >