diff --git a/src/fuse_open.cpp b/src/fuse_open.cpp
index 7349a429..22ba7af2 100644
--- a/src/fuse_open.cpp
+++ b/src/fuse_open.cpp
@@ -335,7 +335,8 @@ namespace FUSE
   open(const char       *fusepath_,
        fuse_file_info_t *ffi_)
   {
-    pt.emplace_or_visit([](const PTMap::value_type &x_)
+    pt.emplace_or_visit(0,std::mutex{},
+                        [](const PTMap::value_type &x_)
                         {
                           
                         });