diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index abafc99496b9..7b74dedc7936 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -720,7 +720,6 @@ struct sock *__mptcp_nmpc_sk(struct mptcp_sock *msk);
 bool __mptcp_close(struct sock *sk, long timeout);
 void mptcp_cancel_work(struct sock *sk);
 void __mptcp_unaccepted_force_close(struct sock *sk);
-void mptcp_set_owner_r(struct sk_buff *skb, struct sock *sk);
 void mptcp_set_state(struct sock *sk, int state);
 
 bool mptcp_addresses_equal(const struct mptcp_addr_info *a,