diff --git a/autoload/sy.vim b/autoload/sy.vim
index 1be8f2c..60ecf62 100644
--- a/autoload/sy.vim
+++ b/autoload/sy.vim
@@ -96,7 +96,7 @@ function! sy#start() abort
 
   let b:sy.id_top = (g:id_top - 1)
 
-  silent doautocmd <nomodeline> User Signify
+  silent! doautocmd <nomodeline> User Signify
 endfunction
 
 " Function: #stop {{{1
diff --git a/doc/signify.txt b/doc/signify.txt
index c2432c6..a16e735 100644
--- a/doc/signify.txt
+++ b/doc/signify.txt
@@ -418,6 +418,8 @@ removes all the signs that Sy placed in the current buffer.  This may be
 useful if your want to use the values from `sy#repo#get_stats()` but do not
 want to see the signs.
 
+NOTE: This feature requires at least Vim 7.3.438 for |<nomodeline>|.
+
 ==============================================================================
 MAPPINGS                                                      *signify-mappings*