diff --git a/lib/libc/sys/intro.2 b/lib/libc/sys/intro.2
index fc102ddef3e..4e728bbf020 100644
--- a/lib/libc/sys/intro.2
+++ b/lib/libc/sys/intro.2
@@ -586,8 +586,7 @@ excluding 0 (NUL) and the
 .Tn ASCII
 code for
 .Ql \&/
-(slash).  (The parity bit,
-bit 7, must be 0.)
+(slash).
 .Pp
 Note that it is generally unwise to use
 .Ql \&* ,