diff --git a/core/AmPrecodedFile.cpp b/core/AmPrecodedFile.cpp
index f535662f..e2da7681 100644
--- a/core/AmPrecodedFile.cpp
+++ b/core/AmPrecodedFile.cpp
@@ -124,7 +124,7 @@ AmPrecodedFileInstance::AmPrecodedFileInstance(precoded_payload_t& precoded_payl
 AmPrecodedFileInstance::~AmPrecodedFileInstance(){
 }
 
-AmAudioFileFormat* AmPrecodedFileInstance::fileName2Fmt(const string& name) {
+AmAudioFileFormat* AmPrecodedFileInstance::fileName2Fmt(const string& name, const string& subtype) {
   return new AmPrecodedFileFormat(precoded_payload);
 }
 
diff --git a/core/AmPrecodedFile.h b/core/AmPrecodedFile.h
index f8f8c0e0..6d70be9b 100644
--- a/core/AmPrecodedFile.h
+++ b/core/AmPrecodedFile.h
@@ -91,7 +91,7 @@ class AmPrecodedFileInstance
   int open();
   
  protected:
-  AmAudioFileFormat* fileName2Fmt(const string& name);
+  AmAudioFileFormat* fileName2Fmt(const string& name, const string& subtype);
 };
 
 class AmPrecodedFile