diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index 17ad600705..d07ff37e57 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -625,6 +625,7 @@ Short explanation of each option:		*option-list*
 'arabic'	  'arab'    for Arabic as a default second language
 'arabicshape'	  'arshape' do shaping for Arabic characters
 'autochdir'	  'acd'     change directory to the file in the current window
+'autocomplete'	  'ac'      enable automatic completion in insert mode
 'autoindent'	  'ai'	    take indent for new line from previous line
 'autoread'	  'ar'	    autom. read file when changed outside of Vim
 'autowrite'	  'aw'	    automatically write file if changed