diff --git a/include/boost/interprocess/detail/os_file_functions.hpp b/include/boost/interprocess/detail/os_file_functions.hpp
index 692eb07..59ef54e 100644
--- a/include/boost/interprocess/detail/os_file_functions.hpp
+++ b/include/boost/interprocess/detail/os_file_functions.hpp
@@ -730,7 +730,7 @@ inline bool delete_subdirectories_recursive
    struct dir_close
    {
       DIR *d_;
-      dir_close(DIR *d) : d_(d) {}
+      dir_close(DIR *dirp) : d_(dirp) {}
       ~dir_close() { ::closedir(d_); }
    } dc(d); (void)dc;