diff --git a/quic/core/quic_packets.h b/quic/core/quic_packets.h
index dab0849..91553d8 100644
--- a/quic/core/quic_packets.h
+++ b/quic/core/quic_packets.h
@@ -406,6 +406,10 @@
 // Allocates a new char[] of size |packet.encrypted_length| and copies in
 // |packet.encrypted_buffer|.
 QUIC_EXPORT_PRIVATE char* CopyBuffer(const SerializedPacket& packet);
+// Allocates a new char[] of size |encrypted_length| and copies in
+// |encrypted_buffer|.
+QUIC_EXPORT_PRIVATE char* CopyBuffer(const char* encrypted_buffer,
+                                     QuicPacketLength encrypted_length);
 
 struct QUIC_EXPORT_PRIVATE SerializedPacketDeleter {
   void operator()(SerializedPacket* packet) {