1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 5a4408c55155..7008fccc164f 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -222,7 +222,7 @@ static inline void TCP_ECN_check_ce(struct tcp_sock *tp, const struct sk_buff *s
         if (!(tp->ecn_flags & TCP_ECN_OK))
                 return;
 
-        switch (TCP_SKB_CB(skb)->flags & INET_ECN_MASK) {
+        switch (TCP_SKB_CB(skb)->ip_dsfield & INET_ECN_MASK) {
         case INET_ECN_NOT_ECT:
                 /* Funny extension: if ECT is not set on a segment,
                  * and we already seen ECT on a previous segment,