diff --git a/net/dccp/ccids/lib/packet_history.c b/net/dccp/ccids/lib/packet_history.c
index 7b6b03e9271a5b7cebc16a952a459182a7dd1f2f..420c60f8604df346e34e5d29065d8c7ed985bc24 100644
--- a/net/dccp/ccids/lib/packet_history.c
+++ b/net/dccp/ccids/lib/packet_history.c
@@ -365,6 +365,25 @@ struct dccp_tx_hist_entry *
 
 EXPORT_SYMBOL_GPL(dccp_tx_hist_find_entry);
 
+int dccp_rx_hist_find_entry(const struct list_head *list, const u64 seq,
+   u8 *ccval)
+{
+	struct dccp_rx_hist_entry *packet = NULL, *entry;
+
+	list_for_each_entry(entry, list, dccphrx_node)
+		if (entry->dccphrx_seqno == seq) {
+			packet = entry;
+			break;
+		}
+
+	if (packet)
+		*ccval = packet->dccphrx_ccval;
+
+	return packet != NULL;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_find_entry);
+
 void dccp_tx_hist_purge_older(struct dccp_tx_hist *hist,
 			      struct list_head *list,
 			      struct dccp_tx_hist_entry *packet)
diff --git a/net/dccp/ccids/lib/packet_history.h b/net/dccp/ccids/lib/packet_history.h
index 27c43092636cde8e9bd8700fcff8c4d9eb48d62b..aea9c5d7091040755228d22d20ca84249fba27de 100644
--- a/net/dccp/ccids/lib/packet_history.h
+++ b/net/dccp/ccids/lib/packet_history.h
@@ -106,6 +106,8 @@ static inline void dccp_tx_hist_entry_delete(struct dccp_tx_hist *hist,
 extern struct dccp_tx_hist_entry *
 			dccp_tx_hist_find_entry(const struct list_head *list,
 						const u64 seq);
+extern int dccp_rx_hist_find_entry(const struct list_head *list, const u64 seq,
+   u8 *ccval);
 
 static inline void dccp_tx_hist_add_entry(struct list_head *list,
 					  struct dccp_tx_hist_entry *entry)