diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8086f457..d732d894 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ full changelog at: https://github.com/sisong/HDiffPatch/commits
 ## [v4.8.0](https://github.com/sisong/HDiffPatch/tree/v4.8.0) - 2024-07-25
 ### Added
 * cmdline hdiffz support option "-c-ldef-{1..12}", used libdeflate compressor; compatible with -c-zlib, faster or better than zlib;
-* hpatchz added libdeflate decompressor, for optimized patch speed when diffFile is compressed by -c-zlib or -c-ldef; (default opened on PC, closed on mobile)
+ (hpatchz now default closed libdeflate decompressor)
 * add plugin ldefCompressPlugin, pldefCompressPlugin, ldefDecompressPlugin;
 ### Changed
 * released Android libhpatchz.so support Android 15 with 16KB page size;
diff --git a/decompress_plugin_demo.h b/decompress_plugin_demo.h
index 8f6603a0..ded23328 100644
--- a/decompress_plugin_demo.h
+++ b/decompress_plugin_demo.h
@@ -29,7 +29,7 @@
 #define HPatch_decompress_plugin_demo_h
 //decompress plugin demo:
 //  zlibDecompressPlugin;   // support all deflate encoding by zlib
-//  ldefDecompressPlugin;   // NOTE: not yet fully compatible with deflate encoding, now only support (p)ldefCompressPlugin
+//  ldefDecompressPlugin;   // optimized deompress speed for deflate encoding
 //  bz2DecompressPlugin;
 //  lzmaDecompressPlugin;
 //  lzma2DecompressPlugin;
diff --git a/hdiffz.cpp b/hdiffz.cpp
index 6a225bbf..c94b7ac9 100644
--- a/hdiffz.cpp
+++ b/hdiffz.cpp
@@ -517,7 +517,7 @@ static hpatch_BOOL _getIsVcDiffFile(const char* diffFileName) {
 #define _try_rt_dec(dec) { if (dec.is_can_open(compressType)) return &dec; }
 
 static hpatch_TDecompress* __find_decompressPlugin(const char* compressType){
-#if ((defined(_CompressPlugin_ldef))&&_CompressPlugin_ldef_is_use_zlib)
+#if (0) //now closed ldef decompressor// ((defined(_CompressPlugin_ldef))&&_CompressPlugin_ldef_is_use_zlib)
     //NOTE: if _CompressPlugin_ldef_is_use_zlib==0, ldefDecompressPlugin can't support all of deflate encoding, only support for (p)ldefCompressPlugin!
     //  if _CompressPlugin_ldef_is_use_zlib==1, ldefDecompressPlugin can support all of deflate encoding by zlib decompressor.
     _try_rt_dec(ldefDecompressPlugin);
diff --git a/hpatchz.c b/hpatchz.c
index d75c733f..a5ead0e6 100644
--- a/hpatchz.c
+++ b/hpatchz.c
@@ -79,7 +79,7 @@
 #if (_IS_NEED_DEFAULT_CompressPlugin)
 //===== select needs decompress plugins or change to your plugin=====
 #   define _CompressPlugin_zlib
-#   define _CompressPlugin_ldef
+//#   define _CompressPlugin_ldef
 #   define _CompressPlugin_bz2
 #   define _CompressPlugin_lzma
 #   define _CompressPlugin_lzma2
@@ -100,7 +100,7 @@
 #       define _CompressPlugin_ldef_is_use_zlib 1 //now ldef need zlib decompresser
 #   endif
 #   if ((defined(_CompressPlugin_zlib))&&_CompressPlugin_ldef_is_use_zlib)
-#       undef _CompressPlugin_zlib
+#       //undef _CompressPlugin_zlib
 #   endif
 #endif
 
@@ -790,7 +790,7 @@ int hpatch_cmd_line(int argc, const char * argv[]){
 #define _try_rt_dec(dec) { if (dec.is_can_open(compressType)) return &dec; }
 
 static const hpatch_TDecompress* __find_decompressPlugin(const char* compressType){
-#if ((defined(_CompressPlugin_ldef))&&_CompressPlugin_ldef_is_use_zlib)
+#if (0) //now closed ldef decompressor// ((defined(_CompressPlugin_ldef))&&_CompressPlugin_ldef_is_use_zlib)
     //NOTE: if _CompressPlugin_ldef_is_use_zlib==0, ldefDecompressPlugin can't support all of deflate encoding, only support for (p)ldefCompressPlugin!
     //  if _CompressPlugin_ldef_is_use_zlib==1, ldefDecompressPlugin can support all of deflate encoding by zlib decompressor.
     _try_rt_dec(ldefDecompressPlugin);