diff --git a/lib/dtsc.h b/lib/dtsc.h
index f604232c..e3d79d8f 100644
--- a/lib/dtsc.h
+++ b/lib/dtsc.h
@@ -249,6 +249,7 @@ namespace DTSC {
       bool seek_time(int seconds);
       bool seek_time(int seconds, int trackNo, bool forceSeek = false);
       bool seek_bpos(int bpos);
+      void rewritePacket(std::string & newPacket, int bytePos);
       void writePacket(std::string & newPacket);
       void writePacket(JSON::Value & newPacket);
       bool atKeyframe();