diff --git a/src/light.cc b/src/light.cc
index 5bb694d..847602f 100644
--- a/src/light.cc
+++ b/src/light.cc
@@ -18,6 +18,10 @@ Light::Light(const Color& color,
 { }
 
 
+Light::~Light()
+{ }
+
+
 Color&
 Light::GetColor()
 {
diff --git a/src/light.hh b/src/light.hh
index 22d0f2f..3175178 100644
--- a/src/light.hh
+++ b/src/light.hh
@@ -20,9 +20,11 @@ struct Light
     Light(const basics::Color& color,
           const Double& intensity = 1.0);
 
+    virtual ~Light();
+
     basics::Color& GetColor();
     const basics::Color& GetColor() const;
-    void SetColor(basics::Color& color);
+    void SetColor(const basics::Color& color);
 
     Double GetIntensity() const;
     void SetIntensity(const Double& intensity);