diff --git a/src/os/win32/ngx_files.h b/src/os/win32/ngx_files.h
index 8cd58ef..f5e50cc 100644
--- a/src/os/win32/ngx_files.h
+++ b/src/os/win32/ngx_files.h
@@ -22,7 +22,10 @@
 #define ngx_open_file(name, flags)                                          \
             CreateFile(name, flags,                                         \
                        FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,  \
+                       NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL)
+/*
                        NULL, OPEN_EXISTING, 0, NULL)
+*/
 
 #define ngx_open_file_n             "CreateFile()"