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diff --git a/src/Common/lzma/LzmaLib.h b/src/Common/lzma/LzmaLib.h
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+++ b/src/Common/lzma/LzmaLib.h
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+/* LzmaLib.h -- LZMA library interface
+2021-04-03 : Igor Pavlov : Public domain */
+
+#ifndef __LZMA_LIB_H
+#define __LZMA_LIB_H
+
+#include "7zTypes.h"
+
+EXTERN_C_BEGIN
+
+#define MY_STDAPI int MY_STD_CALL
+
+#define LZMA_PROPS_SIZE 5
+
+/*
+RAM requirements for LZMA:
+  for compression:   (dictSize * 11.5 + 6 MB) + state_size
+  for decompression: dictSize + state_size
+    state_size = (4 + (1.5 << (lc + lp))) KB
+    by default (lc=3, lp=0), state_size = 16 KB.
+
+LZMA properties (5 bytes) format
+    Offset Size  Description
+      0     1    lc, lp and pb in encoded form.
+      1     4    dictSize (little endian).
+*/
+
+/*
+LzmaCompress
+------------
+
+outPropsSize -
+     In:  the pointer to the size of outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.
+     Out: the pointer to the size of written properties in outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.
+
+  LZMA Encoder will use defult values for any parameter, if it is
+  -1  for any from: level, loc, lp, pb, fb, numThreads
+   0  for dictSize
+  
+level - compression level: 0 <= level <= 9;
+
+  level dictSize algo  fb
+    0:    64 KB   0    32
+    1:   256 KB   0    32
+    2:     1 MB   0    32
+    3:     4 MB   0    32
+    4:    16 MB   0    32
+    5:    16 MB   1    32
+    6:    32 MB   1    32
+    7:    32 MB   1    64
+    8:    64 MB   1    64
+    9:    64 MB   1    64
+ 
+  The default value for "level" is 5.
+
+  algo = 0 means fast method
+  algo = 1 means normal method
+
+dictSize - The dictionary size in bytes. The maximum value is
+        128 MB = (1 << 27) bytes for 32-bit version
+          1 GB = (1 << 30) bytes for 64-bit version
+     The default value is 16 MB = (1 << 24) bytes.
+     It's recommended to use the dictionary that is larger than 4 KB and
+     that can be calculated as (1 << N) or (3 << N) sizes.
+
+lc - The number of literal context bits (high bits of previous literal).
+     It can be in the range from 0 to 8. The default value is 3.
+     Sometimes lc=4 gives the gain for big files.
+
+lp - The number of literal pos bits (low bits of current position for literals).
+     It can be in the range from 0 to 4. The default value is 0.
+     The lp switch is intended for periodical data when the period is equal to 2^lp.
+     For example, for 32-bit (4 bytes) periodical data you can use lp=2. Often it's
+     better to set lc=0, if you change lp switch.
+
+pb - The number of pos bits (low bits of current position).
+     It can be in the range from 0 to 4. The default value is 2.
+     The pb switch is intended for periodical data when the period is equal 2^pb.
+
+fb - Word size (the number of fast bytes).
+     It can be in the range from 5 to 273. The default value is 32.
+     Usually, a big number gives a little bit better compression ratio and
+     slower compression process.
+
+numThreads - The number of thereads. 1 or 2. The default value is 2.
+     Fast mode (algo = 0) can use only 1 thread.
+
+In:
+  dest     - output data buffer
+  destLen  - output data buffer size
+  src      - input data
+  srcLen   - input data size
+Out:
+  destLen  - processed output size
+Returns:
+  SZ_OK               - OK
+  SZ_ERROR_MEM        - Memory allocation error
+  SZ_ERROR_PARAM      - Incorrect paramater
+  SZ_ERROR_OUTPUT_EOF - output buffer overflow
+  SZ_ERROR_THREAD     - errors in multithreading functions (only for Mt version)
+*/
+
+MY_STDAPI LzmaCompress(unsigned char *dest, size_t *destLen, const unsigned char *src, size_t srcLen,
+  unsigned char *outProps, size_t *outPropsSize, /* *outPropsSize must be = 5 */
+  int level,      /* 0 <= level <= 9, default = 5 */
+  unsigned dictSize,  /* default = (1 << 24) */
+  int lc,        /* 0 <= lc <= 8, default = 3  */
+  int lp,        /* 0 <= lp <= 4, default = 0  */
+  int pb,        /* 0 <= pb <= 4, default = 2  */
+  int fb,        /* 5 <= fb <= 273, default = 32 */
+  int numThreads /* 1 or 2, default = 2 */
+  );
+
+/*
+LzmaUncompress
+--------------
+In:
+  dest     - output data buffer
+  destLen  - output data buffer size
+  src      - input data
+  srcLen   - input data size
+Out:
+  destLen  - processed output size
+  srcLen   - processed input size
+Returns:
+  SZ_OK                - OK
+  SZ_ERROR_DATA        - Data error
+  SZ_ERROR_MEM         - Memory allocation arror
+  SZ_ERROR_UNSUPPORTED - Unsupported properties
+  SZ_ERROR_INPUT_EOF   - it needs more bytes in input buffer (src)
+*/
+
+MY_STDAPI LzmaUncompress(unsigned char *dest, size_t *destLen, const unsigned char *src, SizeT *srcLen,
+  const unsigned char *props, size_t propsSize);
+
+EXTERN_C_END
+
+#endif