diff --git a/lib/opus.cpp b/lib/opus.cpp
index 122a21d4..b5e1fcfc 100644
--- a/lib/opus.cpp
+++ b/lib/opus.cpp
@@ -3,6 +3,11 @@
 
 namespace Opus{
 
+
+  uint16_t getPreSkip(const char * initData){
+    return initData[10] + initData[11]* 256;
+  }
+
   unsigned int Opus_getDuration(const char *part){
     const char config = part[0] >> 3;
     const char code = part[0] & 3;
diff --git a/lib/opus.h b/lib/opus.h
index 4c756728..0a09fc28 100644
--- a/lib/opus.h
+++ b/lib/opus.h
@@ -1,6 +1,7 @@
 #include <string>
 
 namespace Opus{
+  uint16_t getPreSkip(const char * initData);
   unsigned int Opus_getDuration(const char *part);
   std::string Opus_prettyPacket(const char *part, int len);
 }