diff --git a/stepmania/src/RageFileDriver.cpp b/stepmania/src/RageFileDriver.cpp
index 8abe07bf21..991a98314c 100644
--- a/stepmania/src/RageFileDriver.cpp
+++ b/stepmania/src/RageFileDriver.cpp
@@ -13,53 +13,6 @@ void RageFileObj::SetError( const CString &err )
 	parent.SetError( err );
 }
 
-int RageFileObj::Seek( int offset )
-{
-	const int OldPos = parent.Tell();
-	if( offset < OldPos )
-		parent.Rewind();
-	else
-		offset -= OldPos;
-
-	char buf[1024*4];
-	while( offset )
-	{
-		/* Must call parent.Read: */
-		int got = parent.Read( buf, min( (int) sizeof(buf), offset ) );
-		if( got == -1 )
-			return -1;
-
-		if( got == 0 )
-			break;
-		offset -= got;
-	}
-
-	return parent.Tell();
-}
-
-int RageFileObj::GetFileSize()
-{
-	int OldPos = parent.Tell();
-	parent.Rewind();
-	char buf[256];
-	int ret = 0;
-	while( 1 )
-	{
-		/* Must call parent.Read: */
-		int got = parent.Read( buf, sizeof(buf) );
-		if( got == -1 )
-		{
-			ret = -1;
-			break;
-		}
-		if( got == 0 )
-			break;
-		ret += got;
-	}
-	Seek( OldPos );
-	return ret;
-}
-
 int RageFileDriver::GetPathValue( const CString &path )
 {
 	vector<CString> parts;
diff --git a/stepmania/src/RageFileDriver.h b/stepmania/src/RageFileDriver.h
index 89965be201..00d2befbda 100644
--- a/stepmania/src/RageFileDriver.h
+++ b/stepmania/src/RageFileDriver.h
@@ -43,8 +43,8 @@ public:
 
 //	virtual CString RealPath() const { return parent->GetPath(); }
 	
-	virtual int Seek( int offset );
-	virtual int GetFileSize();
+	virtual int Seek( int offset ) = 0;
+	virtual int GetFileSize() = 0;
 	virtual CString GetDisplayPath() const { return parent.GetRealPath(); }
 
 	/* Raw I/O: */