diff --git a/fibjs/src/fs/fs.cpp b/fibjs/src/fs/fs.cpp
index 94bd273c6b..dcd2e65b61 100644
--- a/fibjs/src/fs/fs.cpp
+++ b/fibjs/src/fs/fs.cpp
@@ -43,6 +43,10 @@ static date_t s_date;
 
 void init_fs()
 {
+#ifndef _WIN32
+    ::umask(0);
+#endif
+
     s_date.now();
 }