diff --git a/src/blitter/32bpp_sse4.hpp b/src/blitter/32bpp_sse4.hpp
--- a/src/blitter/32bpp_sse4.hpp
+++ b/src/blitter/32bpp_sse4.hpp
@@ -27,17 +27,17 @@
 /** The SSE4 32 bpp blitter (without palette animation). */
 class Blitter_32bppSSE4 : public Blitter_32bppSSSE3 {
 public:
-	/* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
+	void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override;
 	template <BlitterMode mode, Blitter_32bppSSE_Base::ReadMode read_mode, Blitter_32bppSSE_Base::BlockType bt_last, bool translucent>
 	void Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom);
-	/* virtual */ const char *GetName() { return "32bpp-sse4"; }
+	const char *GetName() override { return "32bpp-sse4"; }
 };
 
 /** Factory for the SSE4 32 bpp blitter (without palette animation). */
 class FBlitter_32bppSSE4: public BlitterFactory {
 public:
 	FBlitter_32bppSSE4() : BlitterFactory("32bpp-sse4", "32bpp SSE4 Blitter (no palette animation)", HasCPUIDFlag(1, 2, 19)) {}
-	/* virtual */ Blitter *CreateInstance() { return new Blitter_32bppSSE4(); }
+	Blitter *CreateInstance() override { return new Blitter_32bppSSE4(); }
 };
 
 #endif /* WITH_SSE */