diff --git a/runtime/doc/map.txt b/runtime/doc/map.txt
index e644f83..7d723ce 100644
--- a/runtime/doc/map.txt
+++ b/runtime/doc/map.txt
@@ -1,4 +1,4 @@
-*map.txt*       For Vim version 8.0.  Last change: 2016 Oct 15
+*map.txt*       For Vim version 8.0.  Last change: 2017 Mar 10
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -584,7 +584,8 @@
 
 							*map-comments*
 It is not possible to put a comment after these commands, because the '"'
-character is considered to be part of the {lhs} or {rhs}.
+character is considered to be part of the {lhs} or {rhs}. However, one can
+use |", since this starts a new, empty command with a comment.
 
 							*map_bar* *map-bar*
 Since the '|' character is used to separate a map command from the next