diff --git a/net/ipv4/netfilter/ipt_SYNPROXY.c b/net/ipv4/netfilter/ipt_SYNPROXY.c
index 90e489e..67e17dc 100644
--- a/net/ipv4/netfilter/ipt_SYNPROXY.c
+++ b/net/ipv4/netfilter/ipt_SYNPROXY.c
@@ -285,11 +285,15 @@
 					  XT_SYNPROXY_OPT_ECN);
 
 		synproxy_send_client_synack(skb, th, &opts);
-	} else if (th->ack && !(th->fin || th->rst || th->syn))
+		return NF_DROP;
+
+	} else if (th->ack && !(th->fin || th->rst || th->syn)) {
 		/* ACK from client */
 		synproxy_recv_client_ack(snet, skb, th, &opts, ntohl(th->seq));
+		return NF_DROP;
+	}
 
-	return NF_DROP;
+	return XT_CONTINUE;
 }
 
 static unsigned int ipv4_synproxy_hook(unsigned int hooknum,
diff --git a/net/ipv6/netfilter/ip6t_SYNPROXY.c b/net/ipv6/netfilter/ip6t_SYNPROXY.c
index a5af0bf..19cfea8 100644
--- a/net/ipv6/netfilter/ip6t_SYNPROXY.c
+++ b/net/ipv6/netfilter/ip6t_SYNPROXY.c
@@ -300,11 +300,15 @@
 					  XT_SYNPROXY_OPT_ECN);
 
 		synproxy_send_client_synack(skb, th, &opts);
-	} else if (th->ack && !(th->fin || th->rst || th->syn))
+		return NF_DROP;
+
+	} else if (th->ack && !(th->fin || th->rst || th->syn)) {
 		/* ACK from client */
 		synproxy_recv_client_ack(snet, skb, th, &opts, ntohl(th->seq));
+		return NF_DROP;
+	}
 
-	return NF_DROP;
+	return XT_CONTINUE;
 }
 
 static unsigned int ipv6_synproxy_hook(unsigned int hooknum,