diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index bebb759f470e..4c37f4b215ee 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -667,29 +667,29 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
 	bool port;
 	int len;
 
-	if ((mptcp_pm_should_add_signal_ipv6(msk) ||
-	     mptcp_pm_should_add_signal_port(msk) ||
-	     mptcp_pm_should_add_signal_echo(msk)) &&
-	    skb && skb_is_tcp_pure_ack(skb)) {
-		pr_debug("drop other suboptions");
-		opts->suboptions = 0;
-		opts->ext_copy.use_ack = 0;
-		opts->ext_copy.use_map = 0;
-		remaining += opt_size;
-		drop_other_suboptions = true;
-	}
-
+	/* add addr will strip the existing options, be sure to avoid breaking
+	 * MPC/MPJ handshakes
+	 */
 	if (!mptcp_pm_should_add_signal(msk) ||
-	    !(mptcp_pm_add_addr_signal(msk, remaining, &opts->addr, &echo, &port)))
+	    (opts->suboptions & (OPTION_MPTCP_MPJ_ACK | OPTION_MPTCP_MPC_ACK)) ||
+	    !mptcp_pm_add_addr_signal(msk, skb, opt_size, remaining, &opts->addr,
+		    &echo, &port, &drop_other_suboptions))
 		return false;
 
+	if (drop_other_suboptions)
+		remaining += opt_size;
 	len = mptcp_add_addr_len(opts->addr.family, echo, port);
 	if (remaining < len)
 		return false;
 
 	*size = len;
-	if (drop_other_suboptions)
+	if (drop_other_suboptions) {
+		pr_debug("drop other suboptions");
+		opts->suboptions = 0;
+		opts->ext_copy.use_ack = 0;
+		opts->ext_copy.use_map = 0;
 		*size -= opt_size;
+	}
 	opts->suboptions |= OPTION_MPTCP_ADD_ADDR;
 	if (!echo) {
 		opts->ahmac = add_addr_generate_hmac(msk->local_key,
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 0ed3e565f8f8..24e2f6f6178b 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c
@@ -251,8 +251,10 @@ void mptcp_pm_mp_prio_received(struct sock *sk, u8 bkup)
 
 /* path manager helpers */
 
-bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
-			      struct mptcp_addr_info *saddr, bool *echo, bool *port)
+bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb,
+			      unsigned int opt_size, unsigned int remaining,
+			      struct mptcp_addr_info *saddr, bool *echo,
+			      bool *port, bool *drop_other_suboptions)
 {
 	int ret = false;
 
@@ -262,6 +264,15 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
 	if (!mptcp_pm_should_add_signal(msk))
 		goto out_unlock;
 
+	/* always drop every other options for pure ack ADD_ADDR; this is a
+	 * plain dup-ack from TCP perspective. The other MPTCP-relevant info,
+	 * if any, will be carried by the 'original' TCP ack
+	 */
+	if (skb && skb_is_tcp_pure_ack(skb)) {
+		remaining += opt_size;
+		*drop_other_suboptions = true;
+	}
+
 	*echo = mptcp_pm_should_add_signal_echo(msk);
 	*port = mptcp_pm_should_add_signal_port(msk);
 
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index bc1bfd7ac9c1..40bc9d31e1fa 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -794,8 +794,10 @@ static inline int mptcp_rm_addr_len(const struct mptcp_rm_list *rm_list)
 	return TCPOLEN_MPTCP_RM_ADDR_BASE + roundup(rm_list->nr - 1, 4) + 1;
 }
 
-bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
-			      struct mptcp_addr_info *saddr, bool *echo, bool *port);
+bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb,
+			      unsigned int opt_size, unsigned int remaining,
+			      struct mptcp_addr_info *saddr, bool *echo,
+			      bool *port, bool *drop_other_suboptions);
 bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
 			     struct mptcp_rm_list *rm_list);
 int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc);