diff --git a/src/rendering/polyrenderer/backend/poly_buffers.h b/src/rendering/polyrenderer/backend/poly_buffers.h
index 35376f291..681bacb2f 100644
--- a/src/rendering/polyrenderer/backend/poly_buffers.h
+++ b/src/rendering/polyrenderer/backend/poly_buffers.h
@@ -37,7 +37,7 @@ private:
 	std::vector<uint32_t> mData;
 };
 
-class PolyVertexInputAssembly : public PolyInputAssembly
+class PolyVertexInputAssembly final : public PolyInputAssembly
 {
 public:
 	size_t mOffsets[VATTR_MAX] = {};
diff --git a/src/rendering/polyrenderer/backend/poly_renderstate.h b/src/rendering/polyrenderer/backend/poly_renderstate.h
index 1370a15aa..e6c64bd4e 100644
--- a/src/rendering/polyrenderer/backend/poly_renderstate.h
+++ b/src/rendering/polyrenderer/backend/poly_renderstate.h
@@ -12,7 +12,7 @@
 
 struct HWViewpointUniforms;
 
-class PolyRenderState : public FRenderState
+class PolyRenderState final : public FRenderState
 {
 public:
 	PolyRenderState();