diff --git a/man7/ipv6.7 b/man7/ipv6.7
index 179591e2f..4c80df627 100644
--- a/man7/ipv6.7
+++ b/man7/ipv6.7
@@ -215,10 +215,12 @@ Argument is a pointer to a
 .I struct ipv6_mreq
 .TP
 .B IPV6_MTU
+.BR getsockopt ():
 Retrieve the current known path MTU of the current socket.
 Only valid when the socket has been connected.
 Returns an integer.
 
+.BR setsockopt ():
 Set the MTU to be used for the socket.
 The MTU is limited by the device
 MTU or the path MTU when path MTU discovery is enabled.