diff --git a/include/util/mmap_file.hpp b/include/util/mmap_file.hpp
index 4c73363a9..e06a53c90 100644
--- a/include/util/mmap_file.hpp
+++ b/include/util/mmap_file.hpp
@@ -19,7 +19,8 @@ util::vector_view<T> mmapFile(const std::filesystem::path &file, MmapContainerT
 {
     try
     {
-        mmap_container.open(file);
+        auto path_string = file.string();
+        mmap_container.open(path_string);
         std::size_t num_objects = mmap_container.size() / sizeof(T);
         auto data_ptr = mmap_container.data();
         BOOST_ASSERT(reinterpret_cast<uintptr_t>(data_ptr) % alignof(T) == 0);