diff --git a/man2/access.2 b/man2/access.2
index c66431b95..c27fa9391 100644
--- a/man2/access.2
+++ b/man2/access.2
@@ -173,6 +173,7 @@ If the calling process has appropriate privileges (i.e., is superuser),
 POSIX.1-2001 permits implementation to indicate success for an
 .B X_OK
 check even if none of the execute file permission bits are set.
+.\" HPU-UX 11 and Tru64 5.1 do this.
 Linux does not do this.
 .PP
 A file is only accessible if the permissions on each of the