diff --git a/net/mptcp/mptcp_pm_gen.c b/net/mptcp/mptcp_pm_gen.c
index 673b5167af6ba5..a2325e70ddabd1 100644
--- a/net/mptcp/mptcp_pm_gen.c
+++ b/net/mptcp/mptcp_pm_gen.c
@@ -15,7 +15,7 @@ const struct nla_policy mptcp_pm_address_nl_policy[MPTCP_PM_ADDR_ATTR_IF_IDX + 1
 	[MPTCP_PM_ADDR_ATTR_FAMILY] = { .type = NLA_U16, },
 	[MPTCP_PM_ADDR_ATTR_ID] = { .type = NLA_U8, },
 	[MPTCP_PM_ADDR_ATTR_ADDR4] = { .type = NLA_U32, },
-	[MPTCP_PM_ADDR_ATTR_ADDR6] = { .len = 16, },
+	[MPTCP_PM_ADDR_ATTR_ADDR6] = NLA_POLICY_EXACT_LEN(16),
 	[MPTCP_PM_ADDR_ATTR_PORT] = { .type = NLA_U16, },
 	[MPTCP_PM_ADDR_ATTR_FLAGS] = { .type = NLA_U32, },
 	[MPTCP_PM_ADDR_ATTR_IF_IDX] = { .type = NLA_S32, },