--- a/third_party/zlib/google/zip_reader.cc
+++ b/third_party/zlib/google/zip_reader.cc
@@ -278,10 +278,9 @@
 
   current_entry_info_.reset();
   reached_end_ = false;
-  const int kDefaultCaseSensivityOfOS = 0;
   const int result = unzLocateFile(zip_file_,
                                    path_in_zip.AsUTF8Unsafe().c_str(),
-                                   kDefaultCaseSensivityOfOS);
+                                   NULL);
   if (result != UNZ_OK)
     return false;