diff --git a/runtime/doc/term.txt b/runtime/doc/term.txt
index d930dd33e0..f56dbd4b6d 100644
--- a/runtime/doc/term.txt
+++ b/runtime/doc/term.txt
@@ -1,4 +1,4 @@
-*term.txt*      For Vim version 9.1.  Last change: 2024 Oct 05
+*term.txt*      For Vim version 9.1.  Last change: 2024 Dec 31
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -688,10 +688,11 @@ The default values are set like this: >
 	 let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
 	 let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
 
-Some terminals accept the same sequences, but with all semicolons replaced by
-colons (this is actually more compatible, but less widely supported): >
-	 let &t_8f = "\<Esc>[38:2:%lu:%lu:%lum"
-	 let &t_8b = "\<Esc>[48:2:%lu:%lu:%lum"
+Some terminals accept similar sequences, with semicolons replaced by colons
+and an extra colon after the number 2 (this is conformant to the ISO 8613-6
+standard, but less widely supported): >
+	 let &t_8f = "\<Esc>[38:2::%lu:%lu:%lum"
+	 let &t_8b = "\<Esc>[48:2::%lu:%lu:%lum"
 
 These options contain printf strings, with |printf()| (actually, its C
 equivalent hence `l` modifier) invoked with the t_ option value and three