diff --git a/Code/OysterGraphics/DllInterfaces/GFXAPI.cpp b/Code/OysterGraphics/DllInterfaces/GFXAPI.cpp
index 3722f9f8..5a92f0de 100644
--- a/Code/OysterGraphics/DllInterfaces/GFXAPI.cpp
+++ b/Code/OysterGraphics/DllInterfaces/GFXAPI.cpp
@@ -37,12 +37,12 @@ namespace Oyster
 			return API::Sucsess;
 		}
 
-		void API::SetProjection(Math::Float4x4& projection)
+		void API::SetProjection(const Math::Float4x4& projection)
 		{
 			Projection = projection;
 		}
 
-		void API::SetView(Math::Float4x4& view)
+		void API::SetView(const Math::Float4x4& view)
 		{
 			View = view;
 		}
diff --git a/Code/OysterGraphics/DllInterfaces/GFXAPI.h b/Code/OysterGraphics/DllInterfaces/GFXAPI.h
index cb9e26cc..65f82460 100644
--- a/Code/OysterGraphics/DllInterfaces/GFXAPI.h
+++ b/Code/OysterGraphics/DllInterfaces/GFXAPI.h
@@ -42,9 +42,9 @@ namespace Oyster
 			static void Clean();
 
 			//! @brief Sets the view matrix to use next frame
-			static void SetView(Oyster::Math::Float4x4& View);
+			static void SetView(const Oyster::Math::Float4x4& View);
 			//! @brief Sets the projection matrix to use next frame
-			static void SetProjection(Oyster::Math::Float4x4& Projection);
+			static void SetProjection(const Oyster::Math::Float4x4& Projection);
 
 			//! @brief will internally use last values from SetView and SetProjection
 			static void NewFrame();
@@ -71,7 +71,7 @@ namespace Oyster
 			static void DeleteTexture(Texture);
 
 			//! @brief adds a light to the scene
-			static void AddLight(Definitions::Pointlight light);
+			static void AddLight(const Definitions::Pointlight light);
 			//! @brief removes all lights from the scene
 			static void ClearLights();