diff --git a/src/config.cpp b/src/config.cpp
index 4aa0792f..56500b72 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -108,7 +108,7 @@ Config::Config()
   fsname(),
   func(),
   fuse_msg_size("1M"),
-  gid(fuse_cfg.gid,-1),
+  gid(fuse_cfg.gid,FUSE_CFG_INVALID_ID),
   gid_cache_expire_timeout(60 * 60),
   gid_cache_remove_timeout(60 * 60 * 12),
   ignorepponrename(false),