diff --git a/man4/console_codes.4 b/man4/console_codes.4
index ddafb5d2d..d23f83526 100644
--- a/man4/console_codes.4
+++ b/man4/console_codes.4
@@ -258,7 +258,7 @@ The toggle meta flag
 causes the high bit of a byte to be toggled
 before the mapping table translation is done.
 T}
-21	set normal intensity (ECMA-48 says "doubly underlined")
+21	set underline (<4.17 and many other terminals set normal intensity)
 22	set normal intensity
 24	underline off
 25	blink off