diff --git a/src/realm/util/file.hpp b/src/realm/util/file.hpp
index e98526d614c..e77984f4075 100644
--- a/src/realm/util/file.hpp
+++ b/src/realm/util/file.hpp
@@ -656,9 +656,9 @@ class File {
         mutable size_t m_size = 0;
         size_t m_reservation_size = 0;
         size_t m_offset = 0;
-        FileDesc m_fd;
+        FileDesc m_fd = -1;
         AccessMode m_access_mode = access_ReadOnly;
-        std::string m_path = "gylle";
+        std::string m_path;
 
         MapBase() = default;
         ~MapBase() noexcept;