1 files changed, 3 insertions, 3 deletions
diff --git a/serpent.h b/serpent.h
index bc3ac7a..6bc2f89 100644
--- a/serpent.h
+++ b/serpent.h
@@ -17,7 +17,7 @@ struct Serpent_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 1,
 /// <a href="http://www.weidai.com/scan-mirror/cs.html#Serpent">Serpent</a>
 class Serpent : public Serpent_Info, public BlockCipherDocumentation
 {
-	class Base : public BlockCipherBaseTemplate<Serpent_Info>
+	class CRYPTOPP_NO_VTABLE Base : public BlockCipherBaseTemplate<Serpent_Info>
 	{
 	public:
 		void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
@@ -26,13 +26,13 @@ class Serpent : public Serpent_Info, public BlockCipherDocumentation
 		FixedSizeSecBlock<word32, 140> m_key;
 	};
 
-	class Enc : public Base
+	class CRYPTOPP_NO_VTABLE Enc : public Base
 	{
 	public:
 		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 	};
 
-	class Dec : public Base
+	class CRYPTOPP_NO_VTABLE Dec : public Base
 	{
 	public:
 		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;