diff --git a/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.cpp b/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.cpp
index 0ffa463d67..59806559c6 100644
--- a/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.cpp
+++ b/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.cpp
@@ -46,6 +46,11 @@ DlgCAMSimulator::DlgCAMSimulator(QWindow* parent)
     mMillSimulator = new MillSimulation();
 }
 
+DlgCAMSimulator::~DlgCAMSimulator()
+{
+    delete mMillSimulator;
+}
+
 void DlgCAMSimulator::render(QPainter* painter)
 {
     Q_UNUSED(painter);
diff --git a/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.h b/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.h
index b962424971..ddd8ed981e 100644
--- a/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.h
+++ b/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.h
@@ -62,7 +62,7 @@ class DlgCAMSimulator: public QWindow, public QOpenGLExtraFunctions
     Q_OBJECT
 public:
     explicit DlgCAMSimulator(QWindow* parent = nullptr);
-    ~DlgCAMSimulator() override = default;
+    ~DlgCAMSimulator() override;
 
     virtual void render(QPainter* painter);
     virtual void render();