diff --git a/src/Core/Resource/CLight.cpp b/src/Core/Resource/CLight.cpp
index 2f6b3939..fff46caf 100644
--- a/src/Core/Resource/CLight.cpp
+++ b/src/Core/Resource/CLight.cpp
@@ -82,13 +82,14 @@ float CLight::CalculateIntensity() const
 }
 
 // As is this one... partly
-CVector3f CLight::CalculateSpotAngleAtten()
+CVector3f CLight::CalculateSpotAngleAtten() const
 {
-    if (mType != ELightType::Spot) return CVector3f(1.f, 0.f, 0.f);
+    if (mType != ELightType::Spot)
+        return CVector3f(1.f, 0.f, 0.f);
 
-    float RadianCutoff = mSpotCutoff * (3.1415927f / 180.f);
-    float RadianCosine = cosf(RadianCutoff);
-    float InvCosine = 1.f - RadianCosine;
+    const float RadianCutoff = mSpotCutoff * (3.1415927f / 180.f);
+    const float RadianCosine = cosf(RadianCutoff);
+    const float InvCosine = 1.f - RadianCosine;
 
     return CVector3f(0.f, -RadianCosine / InvCosine, 1.f / InvCosine);
 }
diff --git a/src/Core/Resource/CLight.h b/src/Core/Resource/CLight.h
index ce1635ce..349ac42d 100644
--- a/src/Core/Resource/CLight.h
+++ b/src/Core/Resource/CLight.h
@@ -39,7 +39,7 @@ private:
     // Data Manipulation
     float CalculateRadius() const;
     float CalculateIntensity() const;
-    CVector3f CalculateSpotAngleAtten();
+    CVector3f CalculateSpotAngleAtten() const;
 
 public:
     // Accessors