diff --git a/coding/coding_tests/zip_reader_test.cpp b/coding/coding_tests/zip_reader_test.cpp
index ac004020e3..bfc26b9e0f 100644
--- a/coding/coding_tests/zip_reader_test.cpp
+++ b/coding/coding_tests/zip_reader_test.cpp
@@ -181,3 +181,30 @@ UNIT_TEST(ZipExtract)
 
   FileWriter::DeleteFileX(ZIPFILE);
 }
+
+UNIT_TEST(ZipFileSizes)
+{
+  string const ZIPFILE = "test.zip";
+  {
+    FileWriter f(ZIPFILE);
+    f.Write(zipBytes3, ARRAY_SIZE(zipBytes3));
+  }
+  TEST(ZipFileReader::IsZip(ZIPFILE), ("Not a zip file"));
+
+  vector<string> files = ZipFileReader::FilesList(ZIPFILE);
+  TEST_EQUAL(files.size(), 2, ());
+
+  {
+    ZipFileReader file(ZIPFILE, files[0]);
+    TEST_EQUAL(file.Size(), 6, ());
+    TEST_EQUAL(file.UncompressedSize(), 11, ());
+  }
+
+  {
+    ZipFileReader file(ZIPFILE, files[1]);
+    TEST_EQUAL(file.Size(), 8, ());
+    TEST_EQUAL(file.UncompressedSize(), 9, ());
+  }
+
+  FileWriter::DeleteFileX(ZIPFILE);
+}
diff --git a/coding/zip_reader.cpp b/coding/zip_reader.cpp
index 163e6aea65..68530bdeba 100644
--- a/coding/zip_reader.cpp
+++ b/coding/zip_reader.cpp
@@ -10,7 +10,7 @@
 #include "../3party/zlib/contrib/minizip/unzip.h"
 
 ZipFileReader::ZipFileReader(string const & container, string const & file)
-  : BaseZipFileReaderType(container)
+  : BaseZipFileReaderType(container), m_uncompressedFileSize(0)
 {
   unzFile zip = unzOpen64(container.c_str());
   if (!zip)
@@ -32,14 +32,10 @@ ZipFileReader::ZipFileReader(string const & container, string const & file)
 
   unz_file_info64 fileInfo;
   if (UNZ_OK != unzGetCurrentFileInfo64(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0))
-    MYTHROW(LocateZipException, ("Can't get uncompressed file size inside zip", file));
+    MYTHROW(LocateZipException, ("Can't get compressed file size inside zip", file));
 
-  if (fileInfo.compressed_size != fileInfo.uncompressed_size)
-    MYTHROW(InvalidZipException, ("File should be uncompressed inside zip", file));
-
-  LOG(LDEBUG, (file, "offset:", offset, "size:", fileInfo.uncompressed_size));
-
-  SetOffsetAndSize(offset, fileInfo.uncompressed_size);
+  SetOffsetAndSize(offset, fileInfo.compressed_size);
+  m_uncompressedFileSize = fileInfo.uncompressed_size;
 }
 
 vector<string> ZipFileReader::FilesList(string const & zipContainer)
diff --git a/coding/zip_reader.hpp b/coding/zip_reader.hpp
index a107bc95c0..1e6237f297 100644
--- a/coding/zip_reader.hpp
+++ b/coding/zip_reader.hpp
@@ -13,6 +13,9 @@
 
 class ZipFileReader : public BaseZipFileReaderType
 {
+private:
+  uint64_t m_uncompressedFileSize;
+
 public:
   DECLARE_EXCEPTION(OpenZipException, OpenException);
   DECLARE_EXCEPTION(LocateZipException, OpenException);
@@ -20,7 +23,10 @@ public:
 
   ZipFileReader(string const & container, string const & file);
 
-  // Can also throw Writer::OpenException and Writer::WriteException
+  /// @note Size() returns compressed file size inside zip
+  uint64_t UncompressedSize() const { return m_uncompressedFileSize; }
+
+  /// @warning Can also throw Writer::OpenException and Writer::WriteException
   static void UnzipFile(string const & zipContainer, string const & fileInZip,
                         string const & outFilePath);