diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index e275c43..fb10ccc 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -904,6 +904,7 @@
 'tabpagemax'	  'tpm'     maximum number of tab pages for |-p| and "tab all"
 'tabstop'	  'ts'	    number of spaces that <Tab> in file uses
 'tagbsearch'	  'tbs'     use binary searching in tags files
+'tagcase'	  'tc'      how to handle case when searching in tags files
 'taglength'	  'tl'	    number of significant characters for a tag
 'tagrelative'	  'tr'	    file names in tag file are relative
 'tags'		  'tag'     list of file names used by the tag command