doc: consistent use of markup
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/extensions/libxt_set.man b/extensions/libxt_set.man
index aca1bfc..01b115f 100644
--- a/extensions/libxt_set.man
+++ b/extensions/libxt_set.man
@@ -15,7 +15,7 @@
then the command will match packets for which the source address can be
found in the specified set.
.PP
-The option \fB\-\-match\-set\fR can be replaced by \fB\-\-set\fR if that does
+The option \fB\-\-match\-set\fP can be replaced by \fB\-\-set\fP if that does
not clash with an option of other extensions.
.PP
Use of -m set requires that ipset kernel support is provided. As standard