diff --git a/autoload/dpp/util.vim b/autoload/dpp/util.vim
index 6043253..fc74120 100644
--- a/autoload/dpp/util.vim
+++ b/autoload/dpp/util.vim
@@ -2,7 +2,9 @@ const s:is_windows = has('win32') || has('win64')
 
 function dpp#util#_error(string, name = 'dpp') abort
   echohl Error
-  for line in a:string->string()->split("\n")->filter({ _, val -> val != ''})
+  for line in
+        \ (a:string->type() ==# v:t_string ? a:string : a:string->string())
+        \ ->split("\n")->filter({ _, val -> val != ''})
     echomsg printf('[%s] %s', a:name, line)
   endfor
   echohl None