diff --git a/libfuse/lib/fuse_cfg.cpp b/libfuse/lib/fuse_cfg.cpp
index 3d1151b2..01340252 100644
--- a/libfuse/lib/fuse_cfg.cpp
+++ b/libfuse/lib/fuse_cfg.cpp
@@ -17,5 +17,5 @@ fuse_cfg_t::valid_gid() const
 bool
 fuse_cfg_t::valid_umask() const
 {
-  return (umask != FUSE_CFG_INVALID_ID);
+  return (umask != FUSE_CFG_INVALID_UMASK);
 }