diff --git a/autoload/fern/scheme/file/mapping/ex.vim b/autoload/fern/scheme/file/mapping/ex.vim
index 9862354..58e493a 100644
--- a/autoload/fern/scheme/file/mapping/ex.vim
+++ b/autoload/fern/scheme/file/mapping/ex.vim
@@ -26,7 +26,7 @@ function! s:map_ex(helper) abort
     return
   endif
   call feedkeys("\<Home>", 'in')
-  let expr = join(map(copy(nodes), { _, v -> fnamemodify(v._path, ':~:.') }), ' ')
+  let expr = join(map(copy(nodes), { _, v -> fnameescape(fnamemodify(v._path, ':~:.')) }), ' ')
   let expr = input(':', ' ' . expr, 'command')
   if empty(expr)
     return
diff --git a/doc/fern.txt b/doc/fern.txt
index 8f26ddc..6469e06 100644
--- a/doc/fern.txt
+++ b/doc/fern.txt
@@ -1136,7 +1136,7 @@ The following mappings/actions are only available on file:// scheme.
 *<Plug>(fern-action-ex)*
 *<Plug>(fern-action-ex=)*
 	Open a prompt to execute an Ex command with a path of cursor node or
-	paths of marked nodes.
+	paths of marked nodes. The paths are |fnameescape()|ed.
 	You can use a "=" variant to apply values to the prompt and/or submit
 	a value like:
 >