diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index e81ca7ecbba7..8e06b23b319d 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1924,6 +1924,7 @@ static int __mptcp_recvmsg_mskq(struct sock *sk,
 /* receive buffer autotuning.  See tcp_rcv_space_adjust for more information.
  *
  * Only difference: Use highest rtt estimate of the subflows in use.
+ * mptcp_rcv_buf_optimization
  */
 static void mptcp_rcv_space_adjust(struct mptcp_sock *msk, int copied)
 {