diff --git a/src/core.h b/src/core.h
index 77bd8472e..bd1ddbf5a 100644
--- a/src/core.h
+++ b/src/core.h
@@ -11,6 +11,8 @@
 
 #include <stdio.h>
 
+class CTransaction;
+
 /** An outpoint - a combination of a transaction hash and an index n into its vout */
 class COutPoint
 {
@@ -50,4 +52,17 @@ public:
     }
 };
 
+/** An inpoint - a combination of a transaction and an index n into its vin */
+class CInPoint
+{
+public:
+    CTransaction* ptx;
+    unsigned int n;
+
+    CInPoint() { SetNull(); }
+    CInPoint(CTransaction* ptxIn, unsigned int nIn) { ptx = ptxIn; n = nIn; }
+    void SetNull() { ptx = NULL; n = (unsigned int) -1; }
+    bool IsNull() const { return (ptx == NULL && n == (unsigned int) -1); }
+};
+
 #endif
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 65ae78a13..5a1345d41 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -591,13 +591,12 @@ bool CTransaction::CheckTransaction(CValidationState &state) const
     return true;
 }
 
-int64 CTransaction::GetMinFee(unsigned int nBlockSize, bool fAllowFree,
-                              enum GetMinFee_mode mode) const
+int64 GetMinFee(const CTransaction& tx, unsigned int nBlockSize, bool fAllowFree, enum GetMinFee_mode mode)
 {
     // Base fee is either nMinTxFee or nMinRelayTxFee
-    int64 nBaseFee = (mode == GMF_RELAY) ? nMinRelayTxFee : nMinTxFee;
+    int64 nBaseFee = (mode == GMF_RELAY) ? tx.nMinRelayTxFee : tx.nMinTxFee;
 
-    unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION);
+    unsigned int nBytes = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
     unsigned int nNewBlockSize = nBlockSize + nBytes;
     int64 nMinFee = (1 + (int64)nBytes / 1000) * nBaseFee;
 
@@ -621,7 +620,7 @@ int64 CTransaction::GetMinFee(unsigned int nBlockSize, bool fAllowFree,
     // To limit dust spam, require base fee if any output is less than 0.01
     if (nMinFee < nBaseFee)
     {
-        BOOST_FOREACH(const CTxOut& txout, vout)
+        BOOST_FOREACH(const CTxOut& txout, tx.vout)
             if (txout.nValue < CENT)
                 nMinFee = nBaseFee;
     }
@@ -757,7 +756,7 @@ bool CTxMemPool::accept(CValidationState &state, CTransaction &tx, bool fCheckIn
         unsigned int nSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
 
         // Don't accept it if it can't get into a block
-        int64 txMinFee = tx.GetMinFee(1000, true, GMF_RELAY);
+        int64 txMinFee = GetMinFee(tx, 1000, true, GMF_RELAY);
         if (fLimitFree && nFees < txMinFee)
             return error("CTxMemPool::accept() : not enough fees %s, %"PRI64d" < %"PRI64d,
                          hash.ToString().c_str(),
diff --git a/src/main.h b/src/main.h
index 099e436d9..c3c7ee396 100644
--- a/src/main.h
+++ b/src/main.h
@@ -253,20 +253,6 @@ struct CDiskTxPos : public CDiskBlockPos
 };
 
 
-/** An inpoint - a combination of a transaction and an index n into its vin */
-class CInPoint
-{
-public:
-    CTransaction* ptx;
-    unsigned int n;
-
-    CInPoint() { SetNull(); }
-    CInPoint(CTransaction* ptxIn, unsigned int nIn) { ptx = ptxIn; n = nIn; }
-    void SetNull() { ptx = NULL; n = (unsigned int) -1; }
-    bool IsNull() const { return (ptx == NULL && n == (unsigned int) -1); }
-};
-
-
 
 
 /** An input of a transaction.  It contains the location of the previous
@@ -424,6 +410,8 @@ enum GetMinFee_mode
     GMF_SEND,
 };
 
+int64 GetMinFee(const CTransaction& tx, unsigned int nBlockSize = 1, bool fAllowFree = true, enum GetMinFee_mode mode = GMF_BLOCK);
+
 /** The basic transaction that is broadcasted on the network and contained in
  * blocks. A transaction can contain multiple inputs and outputs.
  */
@@ -575,8 +563,6 @@ public:
         return dPriority > COIN * 144 / 250;
     }
 
-    int64 GetMinFee(unsigned int nBlockSize=1, bool fAllowFree=true, enum GetMinFee_mode mode=GMF_BLOCK) const;
-
     friend bool operator==(const CTransaction& a, const CTransaction& b)
     {
         return (a.nVersion  == b.nVersion &&
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 549d9bbf4..da75752bb 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -1277,7 +1277,7 @@ bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend,
                 // Check that enough fee is included
                 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
                 bool fAllowFree = CTransaction::AllowFree(dPriority);
-                int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree, GMF_SEND);
+                int64 nMinFee = GetMinFee(wtxNew, 1, fAllowFree, GMF_SEND);
                 if (nFeeRet < max(nPayFee, nMinFee))
                 {
                     nFeeRet = max(nPayFee, nMinFee);