diff --git a/autoload/sy.vim b/autoload/sy.vim
index 378e104..5997c52 100644
--- a/autoload/sy.vim
+++ b/autoload/sy.vim
@@ -2,9 +2,6 @@
 
 scriptencoding utf-8
 
-" Init: values {{{1
-let s:has_doau_modeline = v:version > 703 || v:version == 703 && has('patch442')
-
 " Function: #start {{{1
 function! sy#start() abort
   if g:signify_locked
diff --git a/autoload/sy/sign.vim b/autoload/sy/sign.vim
index a080586..8a0fd3c 100644
--- a/autoload/sy/sign.vim
+++ b/autoload/sy/sign.vim
@@ -257,7 +257,7 @@ function! sy#sign#set_signs(sy, vcs, diff) abort
   call sy#sign#process_diff(a:sy, a:vcs, a:diff)
 
   if exists('#User#Signify')
-    execute 'doautocmd' (s:has_doau_modeline ? '<nomodeline>' : '') 'User Signify'
+    doautocmd <nomodeline> User Signify
   endif
 endfunction
 
diff --git a/plugin/signify.vim b/plugin/signify.vim
index 26e2e2b..9ef5b59 100644
--- a/plugin/signify.vim
+++ b/plugin/signify.vim
@@ -9,7 +9,6 @@ endif
 " Init: values {{{1
 let g:loaded_signify = 1
 let g:signify_locked = 0
-let s:has_doau_modeline = v:version > 703 || v:version == 703 && has('patch442')
 
 " Init: autocmds {{{1
 augroup signify
@@ -117,5 +116,5 @@ function! s:save()
 endfunction
 
 if exists('#User#SignifySetup')
-  execute 'doautocmd' (s:has_doau_modeline ? '<nomodeline>' : '') 'User SignifySetup'
+  doautocmd <nomodeline> User SignifySetup
 endif