diff --git a/probtrack.cc b/probtrack.cc
index 7e41d4777408a004cc7b51a98d2b3a9a24ded7d3..4c10814a724342d3b9d08fef93cf723a7ead210b 100644
--- a/probtrack.cc
+++ b/probtrack.cc
@@ -2029,7 +2029,7 @@ void meshtrack(){
       // save_volume(prob,thisout);
     }
   } //Close Seed number Loop
-  mseeds.save_fs_label(logger.AppendDir(opts.outfile.value()));
+  mseeds.save_fs_label(logger.appendDir(opts.outfile.value()));
 }