diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index df4842f..a7dd6a9 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -9752,7 +9752,10 @@
 		:set wc=X
 		:set wc=^I
 		:set wc=<Tab>
-<	NOTE: This option is set to the Vi default value when 'compatible' is
+<	'wildchar' also enables completion in search pattern contexts such as
+	|/|, |?|, |:s|, |:g|, |:v|, and |:vim|.  To insert a literal <Tab>
+	instead of triggering completion, type <C-V><Tab> or "\t".
+	NOTE: This option is set to the Vi default value when 'compatible' is
 	set and to the Vim default value when 'compatible' is reset.
 
 						*'wildcharm'* *'wcm'*