diff --git a/SabreTools.Compression/zlib/zlibConst.cs b/SabreTools.Compression/zlib/zlibConst.cs
new file mode 100644
index 0000000..244b47a
--- /dev/null
+++ b/SabreTools.Compression/zlib/zlibConst.cs
@@ -0,0 +1,23 @@
+namespace SabreTools.Compression.zlib
+{
+    public static class zlibConst
+    {
+        public const int Z_NO_FLUSH = 0;
+        public const int Z_PARTIAL_FLUSH = 1;
+        public const int Z_SYNC_FLUSH = 2;
+        public const int Z_FULL_FLUSH = 3;
+        public const int Z_FINISH = 4;
+        public const int Z_BLOCK = 5;
+        public const int Z_TREES = 6;
+
+        public const int Z_OK = 0;
+        public const int Z_STREAM_END = 1;
+        public const int Z_NEED_DICT = 2;
+        public const int Z_ERRNO = (-1);
+        public const int Z_STREAM_ERROR = (-2);
+        public const int Z_DATA_ERROR = (-3);
+        public const int Z_MEM_ERROR = (-4);
+        public const int Z_BUF_ERROR = (-5);
+        public const int Z_VERSION_ERROR = (-6);
+    }
+}
\ No newline at end of file