diff --git a/init.cpp b/init.cpp
index 9c84dca..7da5131 100644
--- a/init.cpp
+++ b/init.cpp
@@ -418,7 +418,8 @@ bool AppInit2(int argc, char* argv[])
 
     if (mapArgs.count("-paytxfee"))
     {
-        if (!ParseMoney(mapArgs["-paytxfee"], nTransactionFee))
+        if (!ParseMoney(mapArgs["-paytxfee"], nTransactionFee) ||
+	    !ValidFee(nTransactionFee))
         {
             wxMessageBox(_("Invalid amount for -paytxfee=<amount>"), "Bitcoin");
             return false;
diff --git a/main.cpp b/main.cpp
index a47f3a9..2f91a8a 100644
--- a/main.cpp
+++ b/main.cpp
@@ -3840,6 +3840,18 @@ bool SelectCoins(int64 nTargetValue, set<CWalletTx*>& setCoinsRet)
 
 
 
+bool ValidFee(int64 nAmount, bool fAllowZero)
+{
+    if (nAmount == 0 && fAllowZero)
+        return true;
+    if (nAmount < CENT)
+        return false;
+    if (nAmount > (5 * COIN))
+        return false;
+    
+    return true;
+}
+
 
 bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
 {
diff --git a/main.h b/main.h
index a7ef336..f249a08 100644
--- a/main.h
+++ b/main.h
@@ -92,7 +92,7 @@ void BitcoinMiner();
 bool CheckProofOfWork(uint256 hash, unsigned int nBits);
 bool IsInitialBlockDownload();
 string GetWarnings(string strFor);
-
+bool ValidFee(int64 nAmount, bool fAllowZero = true);
 
 
 
diff --git a/rpc.cpp b/rpc.cpp
index 1c6f228..c47108a 100644
--- a/rpc.cpp
+++ b/rpc.cpp
@@ -450,6 +450,28 @@ Value getaddressesbyaccount(const Array& params, bool fHelp)
     return ret;
 }
 
+Value settxfee(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() < 1 || params.size() > 1)
+        throw runtime_error(
+            "settxfee <amount>\n"
+            "<amount> is a real and is rounded to the nearest 0.01");
+
+    // Amount
+    int64 nAmount = AmountFromValue(params[0]);
+
+    // safety range
+    if (!ValidFee(nAmount))
+        return false;
+
+    static CCriticalSection cs;
+    CRITICAL_BLOCK(cs)
+    {
+        nTransactionFee = nAmount;	// note, we still race with readers
+    }
+    return true;
+}
+
 Value sendtoaddress(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() < 2 || params.size() > 4)
@@ -1342,6 +1364,7 @@ pair<string, rpcfn_type> pCallTable[] =
     make_pair("listtransactions",      &listtransactions),
     make_pair("getwork",               &getwork),
     make_pair("listaccounts",          &listaccounts),
+    make_pair("settxfee",              &settxfee),
 };
 map<string, rpcfn_type> mapCallTable(pCallTable, pCallTable + sizeof(pCallTable)/sizeof(pCallTable[0]));
 
@@ -1970,6 +1993,7 @@ int CommandLineRPC(int argc, char *argv[])
         if (strMethod == "setgenerate"            && n > 0) ConvertTo<bool>(params[0]);
         if (strMethod == "setgenerate"            && n > 1) ConvertTo<boost::int64_t>(params[1]);
         if (strMethod == "sendtoaddress"          && n > 1) ConvertTo<double>(params[1]);
+        if (strMethod == "settxfee"               && n > 0) ConvertTo<double>(params[0]);
         if (strMethod == "getamountreceived"      && n > 1) ConvertTo<boost::int64_t>(params[1]); // deprecated
         if (strMethod == "getreceivedbyaddress"   && n > 1) ConvertTo<boost::int64_t>(params[1]);
         if (strMethod == "getreceivedbyaccount"   && n > 1) ConvertTo<boost::int64_t>(params[1]);