diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 8a0ef50c307c..843c61ebd421 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -871,7 +871,7 @@ static void mptcp_subflow_discard_data(struct sock *ssk, struct sk_buff *skb,
 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
 	bool fin = TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN;
 	struct tcp_sock *tp = tcp_sk(ssk);
-	u32 offset, incr, avail_len;
+	u32 offset, incr = 0, avail_len;
 
 	offset = tp->copied_seq - TCP_SKB_CB(skb)->seq;
 	if (WARN_ON_ONCE(offset > skb->len))