diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
index c3220d9144752e18a8252eff038698f199fb472f..14b0a7083f1daf589ea3a3c9554d035bf4d921c0 100644
--- a/include/trace/events/tcp.h
+++ b/include/trace/events/tcp.h
@@ -9,7 +9,13 @@
 #include <linux/tracepoint.h>
 #include <net/ipv6.h>
 
-TRACE_EVENT(tcp_retransmit_skb,
+/*
+ * tcp event with arguments sk and skb
+ *
+ * Note: this class requires a valid sk pointer; while skb pointer could
+ *       be NULL.
+ */
+DECLARE_EVENT_CLASS(tcp_event_sk_skb,
 
 	TP_PROTO(struct sock *sk, struct sk_buff *skb),
 
@@ -64,6 +70,13 @@ TRACE_EVENT(tcp_retransmit_skb,
 		  __entry->saddr_v6, __entry->daddr_v6)
 );
 
+DEFINE_EVENT(tcp_event_sk_skb, tcp_retransmit_skb,
+
+	TP_PROTO(struct sock *sk, struct sk_buff *skb),
+
+	TP_ARGS(sk, skb)
+);
+
 #endif /* _TRACE_TCP_H */
 
 /* This part must be outside protection */