diff --git a/src/mfm_dup.cpp b/src/mfm_dup.cpp
index 9e71d95f..11d57d2d 100644
--- a/src/mfm_dup.cpp
+++ b/src/mfm_dup.cpp
@@ -20,6 +20,7 @@ mfm::dup(const Opts::Dup &opts_)
 {
   std::vector<std::filesystem::path> paths;
 
+  // TODO: expand if mergerfs mount
   paths = opts_.paths;
 
   for(const auto &path : paths)