diff --git a/OfficeUtils/src/OfficeUtils.cpp b/OfficeUtils/src/OfficeUtils.cpp
index c3308260df..11748064cb 100644
--- a/OfficeUtils/src/OfficeUtils.cpp
+++ b/OfficeUtils/src/OfficeUtils.cpp
@@ -216,6 +216,15 @@ HRESULT COfficeUtils::GetFilesSize(const std::wstring& _zipFile, const std::wstr
 	}
 }
 
+int COfficeUtils::GetAddonFlag()
+{
+    return zlip_get_addition_flag();
+}
+void COfficeUtils::SetAddonFlag(int flag)
+{
+    zlip_set_addition_flag(flag);
+}
+
 class CDeflate_private
 {
 public:
diff --git a/OfficeUtils/src/OfficeUtils.h b/OfficeUtils/src/OfficeUtils.h
index f1ef942d4c..e91a01ff30 100644
--- a/OfficeUtils/src/OfficeUtils.h
+++ b/OfficeUtils/src/OfficeUtils.h
@@ -35,6 +35,10 @@
 #include "OfficeUtilsCommon.h"
 #include "../../Common/kernel_config.h"
 
+#define ZLIB_ADDON_FLAG_ZERO                    0
+#define ZLIB_ADDON_FLAG_READ_ONLY               1
+#define ZLIB_ADDON_FLAG_WINDOWS_SHARED_WRITE    2
+
 #ifndef Z_DEFLATED
     #define Z_DEFLATED 8
 #endif
@@ -59,6 +63,8 @@ public:
 	HRESULT CompressFilesFromMemory	(const std::wstring& zipFile, const RequestFileCallback& data_source, void* pParam, short compression_level, bool* result);
 	HRESULT GetFilesSize			(const std::wstring& zipFile, const std::wstring& searchPattern, ULONG64& nCommpressed, ULONG64& nUncommpressed);
 
+    static int GetAddonFlag();
+    static void SetAddonFlag(int flag);
 };
 
 #define DEFLATE_NO_FLUSH      0
diff --git a/OfficeUtils/src/ZipUtilsCP.cpp b/OfficeUtils/src/ZipUtilsCP.cpp
index 86ec6f6361..038637c71a 100644
--- a/OfficeUtils/src/ZipUtilsCP.cpp
+++ b/OfficeUtils/src/ZipUtilsCP.cpp
@@ -846,9 +846,10 @@ int ZipDir( const WCHAR* dir, const WCHAR* outputFile, const OnProgressCallback*
 
     if ( ( zipFile != NULL ) && ( unzipDir != NULL ) )
     {
-      zlip_set_addition_flag(ZLIB_ADDON_FLAG_READ_ONLY);
+      int old = zlip_get_addition_flag();
+      zlip_set_addition_flag(old | ZLIB_ADDON_FLAG_READ_ONLY);
 	  uf = unzOpenHelp (zipFile);
-      zlip_set_addition_flag(ZLIB_ADDON_FLAG_ZERO);
+      zlip_set_addition_flag(old);
     }
 
     if ( uf != NULL )
diff --git a/OfficeUtils/src/zlib-1.2.11/contrib/minizip/iowin32.c b/OfficeUtils/src/zlib-1.2.11/contrib/minizip/iowin32.c
index 274f39eb1d..fc731cbf3a 100644
--- a/OfficeUtils/src/zlib-1.2.11/contrib/minizip/iowin32.c
+++ b/OfficeUtils/src/zlib-1.2.11/contrib/minizip/iowin32.c
@@ -61,6 +61,9 @@ static void win32_translate_open_mode(int mode,
         *lpdwDesiredAccess = GENERIC_READ;
         *lpdwCreationDisposition = OPEN_EXISTING;
         *lpdwShareMode = FILE_SHARE_READ;
+
+        if (zlip_get_addition_flag() & ZLIB_ADDON_FLAG_WINDOWS_SHARED_WRITE)
+            *lpdwShareMode |= FILE_SHARE_WRITE;
     }
     else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
     {
diff --git a/OfficeUtils/src/zlib_addon.h b/OfficeUtils/src/zlib_addon.h
index b5e73cad9b..c656e609b6 100644
--- a/OfficeUtils/src/zlib_addon.h
+++ b/OfficeUtils/src/zlib_addon.h
@@ -31,8 +31,11 @@
  */
 #pragma once
 
-#define ZLIB_ADDON_FLAG_ZERO 0
-#define ZLIB_ADDON_FLAG_READ_ONLY 1
+#ifndef ZLIB_ADDON_FLAG_ZERO
+#define ZLIB_ADDON_FLAG_ZERO                    0
+#define ZLIB_ADDON_FLAG_READ_ONLY               1
+#define ZLIB_ADDON_FLAG_WINDOWS_SHARED_WRITE    2
+#endif
 
 void zlip_set_addition_flag(int flag);
 int zlip_get_addition_flag();