diff --git a/randpool.cpp b/randpool.cpp
index 1813da54..974760b7 100644
--- a/randpool.cpp
+++ b/randpool.cpp
@@ -88,7 +88,21 @@ OldRandomPool::OldRandomPool(unsigned int poolSize)
 
 void OldRandomPool::IncorporateEntropy(const byte *input, size_t length)
 {
-	OldRandomPool::Put(input, length);
+	size_t t;
+	while (length > (t = pool.size() - addPos))
+	{
+		xorbuf(pool+addPos, input, t);
+		input += t;
+		length -= t;
+		Stir();
+	}
+
+	if (length)
+	{
+		xorbuf(pool+addPos, input, length);
+		addPos += length;
+		getPos = pool.size(); // Force stir on get
+	}
 }
 
 void OldRandomPool::Stir()
@@ -106,36 +120,8 @@ void OldRandomPool::Stir()
 	getPos = key.size();
 }
 
-size_t OldRandomPool::Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
+void OldRandomPool::GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword size)
 {
-	CRYPTOPP_UNUSED(messageEnd); CRYPTOPP_UNUSED(blocking);
-
-	size_t t;
-	while (length > (t = pool.size() - addPos))
-	{
-		xorbuf(pool+addPos, inString, t);
-		inString += t;
-		length -= t;
-		Stir();
-	}
-
-	if (length)
-	{
-		xorbuf(pool+addPos, inString, length);
-		addPos += length;
-		getPos = pool.size(); // Force stir on get
-	}
-
-	return 0;
-}
-
-size_t OldRandomPool::TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel, bool blocking)
-{
-	if (!blocking)
-		throw NotImplemented("OldRandomPool: nonblocking transfer is not implemented by this object");
-
-	lword size = transferBytes;
-
 	while (size > 0)
 	{
 		if (getPos == pool.size())
@@ -144,10 +130,7 @@ size_t OldRandomPool::TransferTo2(BufferedTransformation &target, lword &transfe
 		target.ChannelPut(channel, pool+getPos, t);
 		size -= t;
 		getPos += t;
-	}
-
-	return 0;
-}
+	}}
 
 byte OldRandomPool::GenerateByte()
 {
@@ -160,7 +143,7 @@ byte OldRandomPool::GenerateByte()
 void OldRandomPool::GenerateBlock(byte *outString, size_t size)
 {
 	ArraySink sink(outString, size);
-	TransferTo(sink, size);
+	GenerateIntoBufferedTransformation(sink, DEFAULT_CHANNEL, size);
 }
 
 NAMESPACE_END
diff --git a/randpool.h b/randpool.h
index 11029f58..20f356c7 100644
--- a/randpool.h
+++ b/randpool.h
@@ -72,8 +72,7 @@ private:
 //!   HKDF.
 //! \sa RandomPool, AutoSeededRandomPool, HKDF, P1363_KDF2, PKCS12_PBKDF, PKCS5_PBKDF2_HMAC
 //! \since Crypto++ 6.0 (PGP 2.6.x style)
-class CRYPTOPP_DLL OldRandomPool : public RandomNumberGenerator,
-                                   public Bufferless<BufferedTransformation>
+class CRYPTOPP_DLL OldRandomPool : public RandomNumberGenerator
 {
 public:
 	//! \brief Construct an OldRandomPool
@@ -84,26 +83,11 @@ public:
 	// RandomNumberGenerator interface (Crypto++ 5.5 and above)
 	bool CanIncorporateEntropy() const {return true;}
 	void IncorporateEntropy(const byte *input, size_t length);
-
-	// BufferedTransformation interface (Crypto++ 5.4 and below)
-	size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
-
-	bool AnyRetrievable() const {return true;}
-	lword MaxRetrievable() const {return ULONG_MAX;}
-
-	size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true);
-	size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const
-	{
-		CRYPTOPP_UNUSED(target); CRYPTOPP_UNUSED(begin); CRYPTOPP_UNUSED(end);
-		CRYPTOPP_UNUSED(channel); CRYPTOPP_UNUSED(blocking);
-		throw NotImplemented("OldRandomPool: CopyRangeTo2() is not supported by this store");
-	}
+	void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword size);
 
 	byte GenerateByte();
 	void GenerateBlock(byte *output, size_t size);
 
-	void IsolatedInitialize(const NameValuePairs &parameters) {CRYPTOPP_UNUSED(parameters);}
-
 protected:
 	void Stir();
 
diff --git a/validat1.cpp b/validat1.cpp
index cc72530a..3943aace 100644
--- a/validat1.cpp
+++ b/validat1.cpp
@@ -722,7 +722,7 @@ bool TestRandomPool()
 	//  with it in 2017. The missing functionality was a barrier to upgrades.
 	std::cout << "\nTesting OldRandomPool generator...\n\n";
 	{
-		OldRandomPool old1;
+		OldRandomPool old;
 		static const unsigned int ENTROPY_SIZE = 32;
 
 		// https://github.com/weidai11/cryptopp/issues/452
@@ -734,9 +734,9 @@ bool TestRandomPool()
 		};
 
 		SecByteBlock seed(0x00, 384);
-		old1.Put(seed, seed.size());
+		old.IncorporateEntropy(seed, seed.size());
 
-		old1.GenerateBlock(result, sizeof(result));
+		old.GenerateBlock(result, sizeof(result));
 		fail = (0 != ::memcmp(result, expected, sizeof(expected)));
 
 		pass &= !fail;
@@ -746,20 +746,6 @@ bool TestRandomPool()
 			std::cout << "passed:";
 		std::cout << "  Expected sequence from PGP-style RandomPool (circa 2007)\n";
 
-		OldRandomPool old2;
-		old2.IncorporateEntropy(seed, seed.size());
-
-		ArraySink sink(result, sizeof(result));
-		old2.GenerateIntoBufferedTransformation(sink, DEFAULT_CHANNEL, sizeof(result));
-		fail = (0 != ::memcmp(result, expected, sizeof(expected)));
-
-		pass &= !fail;
-		if (fail)
-			std::cout << "FAILED:";
-		else
-			std::cout << "passed:";
-		std::cout << "  Expected sequence from PGP-style RandomPool new interface (circa 2007)\n";
-
 		OldRandomPool prng;
 		MeterFilter meter(new Redirector(TheBitBucket()));
 		RandomNumberSource test(prng, 100000, true, new Deflator(new Redirector(meter)));