diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 0384d6a023f9..c006110b1c56 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -583,14 +583,16 @@ struct mptcp_subflow_context {
 		closing : 1,	    /* must not pass rx data to msk anymore */
 		valid_csum_seen : 1,        /* at least one csum validated */
 		is_mptfo : 1,	    /* subflow is doing TFO */
-		close_event_done : 1,       /* has done the post-closed part */
 		mpc_drop : 1,	    /* the MPC option has been dropped in a rtx */
 		resetting : 1,	    /* subflow is resetting */
-		__unused : 8;
+		__unused : 9;
 	bool	data_avail;
 	bool	scheduled;
 	bool	pm_listener;	    /* a listener managed by the kernel PM? */
 	bool	fully_established;  /* path validated */
+	bool	close_event_done;   /* has done the post-closed part,
+				     * protected by msk socket lock
+				     */
 	u32	lent_mem_frag;
 	u32	remote_nonce;
 	u64	thmac;