diff --git a/rijndael.h b/rijndael.h
index a068d637..7866adcb 100644
--- a/rijndael.h
+++ b/rijndael.h
@@ -46,7 +46,6 @@ class CRYPTOPP_DLL Rijndael : public Rijndael_Info, public BlockCipherDocumentat
 	{
 	public:
 		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
-		void ProcessAndXorBlock_Old(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 	};
 
 public: