diff --git a/src/blitter/32bpp_optimized.hpp b/src/blitter/32bpp_optimized.hpp
--- a/src/blitter/32bpp_optimized.hpp
+++ b/src/blitter/32bpp_optimized.hpp
@@ -23,10 +23,10 @@ public:
 		byte data[];                      ///< Data, all zoomlevels.
 	};
 
-	/* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
-	/* virtual */ Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator);
+	void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override;
+	Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) override;
 
-	/* virtual */ const char *GetName() { return "32bpp-optimized"; }
+	const char *GetName() override { return "32bpp-optimized"; }
 
 	template <BlitterMode mode> void Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom);
 };
@@ -35,7 +35,7 @@ public:
 class FBlitter_32bppOptimized : public BlitterFactory {
 public:
 	FBlitter_32bppOptimized() : BlitterFactory("32bpp-optimized", "32bpp Optimized Blitter (no palette animation)") {}
-	/* virtual */ Blitter *CreateInstance() { return new Blitter_32bppOptimized(); }
+	Blitter *CreateInstance() override { return new Blitter_32bppOptimized(); }
 };
 
 #endif /* BLITTER_32BPP_OPTIMIZED_HPP */