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diff --git a/src/liblzma/lz/lz_encoder_private.h b/src/liblzma/lz/lz_encoder_private.h
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+++ b/src/liblzma/lz/lz_encoder_private.h
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+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       lz_encoder_private.h
+/// \brief      Private definitions for LZ encoder
+//
+//  Copyright (C) 1999-2006 Igor Pavlov
+//  Copyright (C) 2007 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZ_ENCODER_PRIVATE_H
+#define LZMA_LZ_ENCODER_PRIVATE_H
+
+#include "lz_encoder.h"
+
+/// Value used to indicate unused slot
+#define EMPTY_HASH_VALUE 0
+
+/// When the dictionary and hash variables need to be adjusted to prevent
+/// integer overflows. Since we use uint32_t to store the offsets, half
+/// of it is the biggest safe limit.
+#define MAX_VAL_FOR_NORMALIZE (UINT32_MAX / 2)
+
+
+struct lzma_coder_s {
+	lzma_next_coder next;
+	lzma_lz_encoder lz;
+};
+
+#endif