1 files changed, 2 insertions, 5 deletions
diff --git a/man.7 b/man.7
index 263a53ae..4faf4bc4 100644
--- a/man.7
+++ b/man.7
@@ -272,10 +272,6 @@ in the alphabetical reference below.
 .It Sx RB Ta alternate between roman and boldface fonts
 .It Sx RI Ta alternate between roman and italic fonts
 .El
-.Ss Semantic markup
-.Bl -column "PP, LP, P" description
-.It Sx OP Ta optional arguments
-.El
 .Sh MACRO REFERENCE
 This section is a canonical reference to all macros, arranged
 alphabetically.
@@ -443,7 +439,8 @@ and
 .Sx \&TP .
 .Ss \&OP
 Optional command-line argument.
-This has the following syntax:
+This is a non-standard GNU extension, included only for compatibility.
+It has the following syntax:
 .Bd -filled -offset indent
 .Pf \. Sx \&OP
 .Cm key Op Cm value