diff --git a/src/OpenSimBindings/UndoableUiModel.hpp b/src/OpenSimBindings/UndoableUiModel.hpp
index 9b134e47c..bcb2063e3 100644
--- a/src/OpenSimBindings/UndoableUiModel.hpp
+++ b/src/OpenSimBindings/UndoableUiModel.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <filesystem>
 #include <memory>
 
 namespace OpenSim {
@@ -15,10 +16,6 @@ namespace osc {
     class UiModel;
 }
 
-namespace std::filesystem {
-    class path;
-}
-
 namespace osc {
 
     // A "UI ready" model with undo/redo support