diff --git a/man2/iopl.2 b/man2/iopl.2
index 30123c0d2..c4550333b 100644
--- a/man2/iopl.2
+++ b/man2/iopl.2
@@ -97,4 +97,5 @@ and in
 Avoid the latter, it is available on i386 only.
 .SH SEE ALSO
 .BR ioperm (2),
+.BR outb (2),
 .BR capabilities (7)