diff --git a/include/linux/net.h b/include/linux/net.h
index 711c3593c3b8d3..59350fd858231b 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -41,6 +41,7 @@ struct net;
 #define SOCK_NOSPACE		2
 #define SOCK_PASSCRED		3
 #define SOCK_PASSSEC		4
+#define SOCK_CUSTOM_SOCKOPT	5
 
 #ifndef ARCH_HAS_SOCKET_TYPES
 /**
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 2e16c897c22909..e60d144bfb2d9b 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -2708,6 +2708,8 @@ static int mptcp_init_sock(struct sock *sk)
 	if (ret)
 		return ret;
 
+	set_bit(SOCK_CUSTOM_SOCKOPT, &sk->sk_socket->flags);
+
 	/* fetch the ca name; do it outside __mptcp_init_sock(), so that clone will
 	 * propagate the correct value
 	 */
@@ -3684,6 +3686,8 @@ static int mptcp_stream_accept(struct socket *sock, struct socket *newsock,
 		struct mptcp_subflow_context *subflow;
 		struct sock *newsk = newsock->sk;
 
+		set_bit(SOCK_CUSTOM_SOCKOPT, &newsock->flags);
+
 		lock_sock(newsk);
 
 		/* PM/worker can now acquire the first subflow socket
diff --git a/net/socket.c b/net/socket.c
index 00da9ce3dba0bf..55c5d536e5f603 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2199,13 +2199,7 @@ SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size,
 
 static bool sock_use_custom_sol_socket(const struct socket *sock)
 {
-	const struct sock *sk = sock->sk;
-
-	/* Use sock->ops->setsockopt() for MPTCP */
-	return IS_ENABLED(CONFIG_MPTCP) &&
-	       sk->sk_protocol == IPPROTO_MPTCP &&
-	       sk->sk_type == SOCK_STREAM &&
-	       (sk->sk_family == AF_INET || sk->sk_family == AF_INET6);
+	return test_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags);
 }
 
 /*