diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index 168e785..f6505e6 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -1,4 +1,4 @@
-*quickref.txt*  For Vim version 8.1.  Last change: 2019 May 31
+*quickref.txt*  For Vim version 8.1.  Last change: 2019 Jul 18
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -829,6 +829,7 @@
 'perldll'		    name of the Perl dynamic library
 'preserveindent'  'pi'	    preserve the indent structure when reindenting
 'previewheight'   'pvh'     height of the preview window
+'previewpopup'    'pvp'     use popup window for preview
 'previewwindow'   'pvw'     identifies the preview window
 'printdevice'	  'pdev'    name of the printer to be used for :hardcopy
 'printencoding'   'penc'    encoding to be used for printing