diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index a514b6f..0fc00b4 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -8679,6 +8679,9 @@
 	set to a name that starts with "xterm", "mlterm", "screen", "tmux",
 	"st" (full match only), "st-" or "stterm", and 'ttymouse' is not set
 	already.
+	If the terminfo/termcap entry "XM" exists and the first number is
+	"1006" then 'ttymouse' will be set to "sgr".  This works for many
+	modern terminals.
 	Additionally, if vim is compiled with the |+termresponse| feature and
 	|t_RV| is set to the escape sequence to request the xterm version
 	number, more intelligent detection is done.