diff --git a/stepmania/src/RageFileDriverDeflate.cpp b/stepmania/src/RageFileDriverDeflate.cpp
index 2421f05bd3..83f96525f0 100644
--- a/stepmania/src/RageFileDriverDeflate.cpp
+++ b/stepmania/src/RageFileDriverDeflate.cpp
@@ -48,26 +48,21 @@ RageFileObjInflate::RageFileObjInflate( const RageFileObjInflate &cpy ):
 {
 	/* XXX completely untested */
 	/* Copy the entire decode state. */
-	/* inflateInit2 isn't widespread yet */
-	ASSERT( 0 );
-/*
 	m_pFile = cpy.m_pFile->Copy();
 	m_bFileOwned = true;
 	m_pInflate = new z_stream;
+	m_iUncompressedSize = cpy.m_iUncompressedSize;
+	m_iFilePos = cpy.m_iFilePos;
 	inflateCopy( m_pInflate, const_cast<z_stream*>(cpy.m_pInflate) );
 
-	// memcpy decomp_buf?
 	decomp_buf_ptr = decomp_buf + (cpy.decomp_buf_ptr - cpy.decomp_buf);
 	decomp_buf_avail = cpy.decomp_buf_avail;
-	m_iFilePos = cpy.m_iFilePos;
-	*/
+	memcpy( decomp_buf, cpy.decomp_buf, decomp_buf_avail );
 }
 
 RageFileObjInflate *RageFileObjInflate::Copy() const
 {
-	RageException::Throw( "Loading ZIPs from deflated ZIPs is currently disabled; see RageFileObjInflate." );
-
-	// return new RageFileObjInflate( *this, p );
+	return new RageFileObjInflate( *this );
 }