diff --git a/autoload/asyncdo.vim b/autoload/asyncdo.vim
index 7c53ecf..c67e739 100644
--- a/autoload/asyncdo.vim
+++ b/autoload/asyncdo.vim
@@ -17,7 +17,7 @@ endfunc
 
 " expand filename-modifiers explicitly
 func! s:fnameexpand(str) abort
-    return substitute(a:str, '\v\\=%(\%|\#)%(\:[phrte])*', {a->expand(a[0])}, 'g')
+    return substitute(a:str, '\v\\=%(\%|\#)%(\:[phrte~.S])*', {a->expand(a[0])}, 'g')
 endfunc
 
 " prepare backslashes for shell consumption via job logic in s:build