diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index 319be2991..29fabafd8 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -157,7 +157,7 @@ static void RegisterLoad(const string& strInput)
 static void MutateTxVersion(CMutableTransaction& tx, const string& cmdVal)
 {
     int64_t newVersion = atoi64(cmdVal);
-    if (newVersion < 1 || newVersion > CTransaction::CURRENT_VERSION)
+    if (newVersion < CTransaction::MIN_CURRENT_VERSION || newVersion > CTransaction::MAX_CURRENT_VERSION)
         throw runtime_error("Invalid TX version requested");
 
     tx.nVersion = (int) newVersion;
diff --git a/src/main.cpp b/src/main.cpp
index 2b09a50d6..7a1336fb7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -564,7 +564,7 @@ bool AddOrphanTx(const CTransaction& tx, NodeId peer)
     // have been mined or received.
     // 10,000 orphans, each of which is at most 5,000 bytes big is
     // at most 500 megabytes of orphans:
-    unsigned int sz = tx.GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
+    unsigned int sz = tx.GetSerializeSize(SER_NETWORK, tx.nVersion);
     if (sz > 5000)
     {
         LogPrint("mempool", "ignoring large orphan tx (size: %u, hash: %s)\n", sz, hash.ToString());
@@ -639,7 +639,7 @@ unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
 
 bool IsStandardTx(const CTransaction& tx, string& reason)
 {
-    if (tx.nVersion > CTransaction::CURRENT_VERSION || tx.nVersion < 1) {
+    if (tx.nVersion > CTransaction::MAX_CURRENT_VERSION || tx.nVersion < CTransaction::MIN_CURRENT_VERSION) {
         reason = "version";
         return false;
     }
diff --git a/src/primitives/transaction.cpp b/src/primitives/transaction.cpp
index 1cedd6f27..e18024327 100644
--- a/src/primitives/transaction.cpp
+++ b/src/primitives/transaction.cpp
@@ -113,7 +113,7 @@ std::string CTxOut::ToString() const
     return strprintf("CTxOut(nValue=%d.%08d, scriptPubKey=%s)", nValue / COIN, nValue % COIN, scriptPubKey.ToString().substr(0,30));
 }
 
-CMutableTransaction::CMutableTransaction() : nVersion(CTransaction::CURRENT_VERSION), nLockTime(0) {}
+CMutableTransaction::CMutableTransaction() : nVersion(CTransaction::MIN_CURRENT_VERSION), nLockTime(0) {}
 CMutableTransaction::CMutableTransaction(const CTransaction& tx) : nVersion(tx.nVersion), vin(tx.vin), vout(tx.vout), nLockTime(tx.nLockTime),
                                                                    vjoinsplit(tx.vjoinsplit), joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig)
 {
@@ -130,7 +130,7 @@ void CTransaction::UpdateHash() const
     *const_cast<uint256*>(&hash) = SerializeHash(*this);
 }
 
-CTransaction::CTransaction() : nVersion(CTransaction::CURRENT_VERSION), vin(), vout(), nLockTime(0), vjoinsplit(), joinSplitPubKey(), joinSplitSig() { }
+CTransaction::CTransaction() : nVersion(CTransaction::MIN_CURRENT_VERSION), vin(), vout(), nLockTime(0), vjoinsplit(), joinSplitPubKey(), joinSplitSig() { }
 
 CTransaction::CTransaction(const CMutableTransaction &tx) : nVersion(tx.nVersion), vin(tx.vin), vout(tx.vout), nLockTime(tx.nLockTime), vjoinsplit(tx.vjoinsplit),
                                                             joinSplitPubKey(tx.joinSplitPubKey), joinSplitSig(tx.joinSplitSig)
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index 2e83773c4..f43a75a88 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -294,7 +294,9 @@ private:
 public:
     typedef boost::array<unsigned char, 64> joinsplit_sig_t;
 
-    static const int32_t CURRENT_VERSION=1;
+    // Transactions that include a list of JoinSplits are version 2.
+    static const int32_t MIN_CURRENT_VERSION = 1;
+    static const int32_t MAX_CURRENT_VERSION = 2;
 
     // The local variables are made const to prevent unintended modification
     // without updating the cached hash value. However, CTransaction is not