diff --git a/stepmania/src/RageFileDriverMemory.cpp b/stepmania/src/RageFileDriverMemory.cpp
index f32906768b..416c5e8b87 100644
--- a/stepmania/src/RageFileDriverMemory.cpp
+++ b/stepmania/src/RageFileDriverMemory.cpp
@@ -102,6 +102,13 @@ const CString &RageFileObjMem::GetString() const
 	return m_pFile->m_sBuf;
 }
 
+void RageFileObjMem::PutString( const CString &sBuf )
+{
+	m_pFile->m_Mutex.Lock();
+	m_pFile->m_sBuf = sBuf;
+	m_pFile->m_Mutex.Unlock();
+}
+
 RageFileDriverMem::RageFileDriverMem():
 	RageFileDriver( new NullFilenameDB ),
 	m_Mutex("RageFileDriverMem")
diff --git a/stepmania/src/RageFileDriverMemory.h b/stepmania/src/RageFileDriverMemory.h
index 78705fb7f5..0f73970a37 100644
--- a/stepmania/src/RageFileDriverMemory.h
+++ b/stepmania/src/RageFileDriverMemory.h
@@ -22,6 +22,7 @@ public:
 
 	/* Retrieve the contents of this file. */
 	const CString &GetString() const;
+	void PutString( const CString &sBuf );
 
 private:
 	RageFileObjMemFile *m_pFile;