diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/cmaterial.h b/3d-viewer/3d_rendering/3d_render_raytracing/cmaterial.h
index 3f7f907bec..5a88c98a34 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/cmaterial.h
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/cmaterial.h
@@ -175,6 +175,8 @@ public:
                float aTransparency,
                float aReflection );
 
+    virtual ~CMATERIAL() {}
+
     const SFVEC3F &GetAmbientColor()  const { return m_ambientColor; }
     const SFVEC3F &GetEmissiveColor() const { return m_emissiveColor; }
     const SFVEC3F &GetSpecularColor() const { return m_specularColor; }