diff --git a/runtime/doc/map.txt b/runtime/doc/map.txt
index 494b629..f2b6a61 100644
--- a/runtime/doc/map.txt
+++ b/runtime/doc/map.txt
@@ -1,4 +1,4 @@
-*map.txt*       For Vim version 9.0.  Last change: 2022 Oct 19
+*map.txt*       For Vim version 9.0.  Last change: 2022 Nov 14
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -584,6 +584,9 @@
 The |:filter| command can be used to select what mappings to list.  The
 pattern is matched against the {lhs} and {rhs} in the raw form.
 
+While mappings are being listed, it is not possible to add or clear mappings,
+e.g. from a timer callback. *E1309*
+
 							*:map-verbose*
 When 'verbose' is non-zero, listing a key map will also display where it was
 last defined.  Example: >
@@ -1476,6 +1479,8 @@
 
 :delc[ommand] {cmd}				*:delc* *:delcommand* *E184*
 			Delete the user-defined command {cmd}.
+			This is not allowed while listing commands, e.g. from
+			a timer. *E1311*
 
 :delc[ommand] -buffer {cmd}					*E1237*
 			Delete the user-defined command {cmd} that was defined