diff --git a/include/eunzip.hrl b/include/eunzip.hrl
index ed3f54e..3af2acb 100644
--- a/include/eunzip.hrl
+++ b/include/eunzip.hrl
@@ -4,7 +4,18 @@
 
 % Compression methods
 -define(M_STORE, 0).
+-define(M_SHRUNK, 1).
+-define(M_REDUCE_LVL1, 2).
+-define(M_REDUCE_LVL2, 3).
+-define(M_REDUCE_LVL3, 4).
+-define(M_REDUCE_LVL4, 5).
+-define(M_IMPLODE, 6).
 -define(M_DEFLATE, 8).
+-define(M_DEFLATE64, 9).
+-define(M_BZIP2, 12).
+-define(M_LZMA, 14).
+-define(M_PPMD, 15).
+-define(M_WAVPACK, 99).
 
 % EOCD specific
 -define(eocd_search_limit, 5 * 1024 * 1024).    % 5 MB
diff --git a/src/eunzip.erl b/src/eunzip.erl
index dfa7e28..05a1b4f 100644
--- a/src/eunzip.erl
+++ b/src/eunzip.erl
@@ -35,7 +35,7 @@
     zip_handle :: file:fd(),
     offset :: non_neg_integer(),
     end_offset :: non_neg_integer(),
-    compression_method :: ?M_STORE | ?M_DEFLATE | non_neg_integer(),
+    compression_method :: ?M_STORE | ?M_DEFLATE | ?M_DEFLATE64 | non_neg_integer(),
     z_stream :: zlib:zstream() | 'undefined',
     crc :: non_neg_integer(),
     acc_crc :: non_neg_integer() | 'undefined',