diff --git a/src/config.hpp b/src/config.hpp
index b3062109..2ea57132 100644
--- a/src/config.hpp
+++ b/src/config.hpp
@@ -85,7 +85,7 @@ public:
   Config& operator=(const Config&);
 
 public:
-  TFSRef<>       foo{fuse_cfg.debug,false};
+  TFSRef<>       foo(fuse_cfg.debug,false);
   ConfigBOOL     allow_idmap;
   ConfigBOOL     async_read;
   ConfigBOOL     auto_cache;