diff --git a/src/fuse_open.cpp b/src/fuse_open.cpp
index 7c31d477..a758251b 100644
--- a/src/fuse_open.cpp
+++ b/src/fuse_open.cpp
@@ -334,7 +334,7 @@ namespace FUSE
   open(const char       *fusepath_,
        fuse_file_info_t *ffi_)
   {
-    pt.emplace_or_visit(std::mutex{},
+    pt.emplace_or_visit(std::string{fusepath_},
                         [](const PTMap::value_type &x_)
                         {