1 files changed, 1 insertions, 0 deletions
diff --git a/buffer.h b/buffer.h
index e46939b..2e3a75e 100644
--- a/buffer.h
+++ b/buffer.h
@@ -58,6 +58,7 @@ protected:
   friend class TunDevice;
   friend class UDPPacketSource;
   friend class AesIcmCypher;
+  friend class KeyDerivation;   // 
 
   u_int8_t *buf_;
   u_int32_t length_;