diff --git a/src/cpp/ripple/LedgerFormats.h b/src/cpp/ripple/LedgerFormats.h
index e39e7a8945..4c2ba9c54d 100644
--- a/src/cpp/ripple/LedgerFormats.h
+++ b/src/cpp/ripple/LedgerFormats.h
@@ -3,6 +3,8 @@
 
 #include "SerializedObject.h"
 
+#define ENABLE_REQUIRE_DEST_TAG		0
+
 // Used as the type of a transaction or the type of a ledger entry.
 enum LedgerEntryType
 {
@@ -40,6 +42,9 @@ enum LedgerSpecificFlags
 {
 	// ltACCOUNT_ROOT
 	lsfPasswordSpent	= 0x00010000,	// True, if password set fee is spent.
+#if ENABLE_REQUIRE_DEST_TAG
+	lsfRequireDestTag	= 0x00020000,	// True, to require a DestinationTag for payments.
+#endif
 
 	// ltOFFER
 	lsfPassive			= 0x00010000,
diff --git a/src/cpp/ripple/PaymentTransactor.cpp b/src/cpp/ripple/PaymentTransactor.cpp
index e5e27a057c..9cc97309ea 100644
--- a/src/cpp/ripple/PaymentTransactor.cpp
+++ b/src/cpp/ripple/PaymentTransactor.cpp
@@ -99,6 +99,14 @@ TER PaymentTransactor::doApply()
 		sleDst->setFieldAccount(sfAccount, uDstAccountID);
 		sleDst->setFieldU32(sfSequence, 1);
 	}
+#if ENABLE_REQUIRE_DEST_TAG
+	else if ((sleDst->getFlags() & lsfRequireDestTag) && !mTxn.isFieldPresent(sfDestinationTag))
+	{
+		cLog(lsINFO) << "doPayment: Malformed transaction: DestinationTag required.";
+
+		return temINVALID;
+	}
+#endif
 	else
 	{
 		mEngine->entryModify(sleDst);
diff --git a/src/cpp/ripple/SerializeProto.h b/src/cpp/ripple/SerializeProto.h
index 57ef55200f..fc6ee038a6 100644
--- a/src/cpp/ripple/SerializeProto.h
+++ b/src/cpp/ripple/SerializeProto.h
@@ -1,6 +1,8 @@
 // This is not really a header file, but it can be used as one with
 // appropriate #define statements.
 
+#define ENABLE_DESTINATION_TAG		0
+
 	// types (common)
 	TYPE(Int16,				UINT16,		1)
 	TYPE(Int32,				UINT32,		2)
@@ -44,6 +46,9 @@
 	FIELD(TransferRate,			UINT32, 11)
 	FIELD(WalletSize,			UINT32, 12)
 	FIELD(OwnerCount,			UINT32, 13)
+#if ENABLE_DESTINATION_TAG
+	FIELD(DestinationTag,		UINT32, 14)
+#endif
 
 	// 32-bit integers (uncommon)
 	FIELD(HighQualityIn,		UINT32, 16)
diff --git a/src/cpp/ripple/Transaction.h b/src/cpp/ripple/Transaction.h
index 35d33b91a5..29505f285f 100644
--- a/src/cpp/ripple/Transaction.h
+++ b/src/cpp/ripple/Transaction.h
@@ -84,7 +84,7 @@ public:
 	STAmount getAmount() const						{ return mTransaction->getFieldU64(sfAmount); }
 	STAmount getFee() const							{ return mTransaction->getTransactionFee(); }
 	uint32 getFromAccountSeq() const				{ return mTransaction->getSequence(); }
-	uint32 getIdent() const							{ return mTransaction->getFieldU32(sfSourceTag); }
+	uint32 getSourceTag() const						{ return mTransaction->getFieldU32(sfSourceTag); }
 	std::vector<unsigned char> getSignature() const	{ return mTransaction->getSignature(); }
 	uint32 getLedger() const						{ return mInLedger; }
 	TransStatus getStatus() const					{ return mStatus; }
diff --git a/src/cpp/ripple/TransactionErr.cpp b/src/cpp/ripple/TransactionErr.cpp
index 131e03ad34..b02b2c50ce 100644
--- a/src/cpp/ripple/TransactionErr.cpp
+++ b/src/cpp/ripple/TransactionErr.cpp
@@ -53,6 +53,9 @@ bool transResultInfo(TER terCode, std::string& strToken, std::string& strHuman)
 		{	temBAD_SEQUENCE,		"temBAD_SEQUENCE",			"Malformed: Sequence is not in the past."				},
 		{	temDST_IS_SRC,			"temDST_IS_SRC",			"Destination may not be source."						},
 		{	temDST_NEEDED,			"temDST_NEEDED",			"Destination not specified."							},
+#if ENABLE_REQUIRE_DEST_TAG
+		{	temDST_TAG_NEEDED,		"temDST_TAG_NEEDED",		"Destination tag required."								},
+#endif
 		{	temINVALID,				"temINVALID",				"The transaction is ill-formed."						},
 		{	temINVALID_FLAG,		"temINVALID_FLAG",			"The transaction has an invalid flag."					},
 		{	temREDUNDANT,			"temREDUNDANT",				"Sends same currency to self."							},
diff --git a/src/cpp/ripple/TransactionErr.h b/src/cpp/ripple/TransactionErr.h
index 85f8226072..676a84142b 100644
--- a/src/cpp/ripple/TransactionErr.h
+++ b/src/cpp/ripple/TransactionErr.h
@@ -39,6 +39,9 @@ enum TER	// aka TransactionEngineResult
 	temBAD_SEQUENCE,
 	temDST_IS_SRC,
 	temDST_NEEDED,
+#if ENABLE_REQUIRE_DEST_TAG
+	temDST_TAG_NEEDED,
+#endif
 	temINVALID,
 	temINVALID_FLAG,
 	temREDUNDANT,
diff --git a/src/cpp/ripple/TransactionFormats.cpp b/src/cpp/ripple/TransactionFormats.cpp
index b428ed7640..8e77e585c2 100644
--- a/src/cpp/ripple/TransactionFormats.cpp
+++ b/src/cpp/ripple/TransactionFormats.cpp
@@ -55,6 +55,9 @@ static bool TFInit()
 		<< SOElement(sfSendMax,			SOE_OPTIONAL)
 		<< SOElement(sfPaths,			SOE_DEFAULT)
 		<< SOElement(sfInvoiceID,		SOE_OPTIONAL)
+#if ENABLE_DESTINATION_TAG
+		<< SOElement(sfDestinationTag,	SOE_OPTIONAL)
+#endif
 		;
 
 	DECLARE_TF(Contract, ttCONTRACT)