diff --git a/runtime/autoload/tutor.vim b/runtime/autoload/tutor.vim
index c3b5df37d9..a31f74680a 100644
--- a/runtime/autoload/tutor.vim
+++ b/runtime/autoload/tutor.vim
@@ -211,7 +211,7 @@ function! tutor#TutorCmd(tutor_name)
     endif
 
     call tutor#SetupVim()
-    exe "drop ".l:to_open
+    exe "drop ".fnameescape(l:to_open)
     call tutor#EnableInteractive(v:true)
 endfunction