diff --git a/TurboPFor-Integer-Compression/lib/ext/bg/defines.h b/TurboPFor-Integer-Compression/lib/ext/bg/defines.h
new file mode 100644
index 0000000..2ed6cda
--- /dev/null
+++ b/TurboPFor-Integer-Compression/lib/ext/bg/defines.h
@@ -0,0 +1,54 @@
+/**
+ *  @file defines.h
+ *  @author Sheng Di
+ *  @date July, 2019
+ *  @brief Header file for the dataCompression.c.
+ *  (C) 2016 by Mathematics and Computer Science (MCS), Argonne National Laboratory.
+ *      See COPYRIGHT in top-level directory.
+ */
+
+#ifndef _BG_DEFINES_H
+#define _BG_DEFINES_H
+
+#define BG_VER_MAJOR 2
+#define BG_VER_MINOR 1
+#define BG_VER_BUILD 9
+#define BG_VER_REVISION 0
+
+#define BG 105
+#define BITGROOM 0
+#define BITSHAVE 1
+#define BITSET 2
+
+#define BG_FLOAT 0
+#define BG_DOUBLE 1
+#define BG_UINT8 2
+#define BG_INT8 3
+#define BG_UINT16 4
+#define BG_INT16 5
+#define BG_UINT32 6
+#define BG_INT32 7
+#define BG_UINT64 8
+#define BG_INT64 9
+
+#define BG_NSD 0
+#define BG_DSD 1
+
+#define LITTLE_ENDIAN_DATA 0 //refers to the endian type of the data read from the disk
+#define BIG_ENDIAN_DATA 1 //big_endian (ppc, max, etc.) ; little_endian (x86, x64, etc.)
+
+#define LITTLE_ENDIAN_SYSTEM 0 //refers to the endian type of the system
+#define BIG_ENDIAN_SYSTEM 1
+
+#define DynArrayInitLen 1024
+
+//SUCCESS returning status
+#define BG_SCES 0  //successful
+#define BG_NSCS -1 //Not successful
+#define BG_FERR -2 //Failed to open input file
+#define BG_TERR -3 //wrong data type (should be only float or double)
+#define BG_DERR -4 //dimension error
+#define BG_MERR -5 //sz_mode error
+#define BG_BERR -6 //bound-mode error (should be only ABS, REL, ABS_AND_REL, ABS_OR_REL, or PW_REL)
+
+#endif /* _BG_DEFINES_H */