diff --git a/src/alert.cpp b/src/alert.cpp
index 4429ecadc..46e861be9 100644
--- a/src/alert.cpp
+++ b/src/alert.cpp
@@ -51,8 +51,8 @@ std::string CUnsignedAlert::ToString() const
     return strprintf(
         "CAlert(\n"
         "    nVersion     = %d\n"
-        "    nRelayUntil  = %"PRId64"\n"
-        "    nExpiration  = %"PRId64"\n"
+        "    nRelayUntil  = %d\n"
+        "    nExpiration  = %d\n"
         "    nID          = %d\n"
         "    nCancel      = %d\n"
         "    setCancel    = %s\n"
diff --git a/src/core.cpp b/src/core.cpp
index f5c460761..cbdd24e80 100644
--- a/src/core.cpp
+++ b/src/core.cpp
@@ -64,7 +64,7 @@ uint256 CTxOut::GetHash() const
 
 std::string CTxOut::ToString() const
 {
-    return strprintf("CTxOut(nValue=%"PRId64".%08"PRId64", scriptPubKey=%s)", nValue / COIN, nValue % COIN, scriptPubKey.ToString().substr(0,30));
+    return strprintf("CTxOut(nValue=%d.%08d, scriptPubKey=%s)", nValue / COIN, nValue % COIN, scriptPubKey.ToString().substr(0,30));
 }
 
 void CTxOut::print() const
diff --git a/src/db.cpp b/src/db.cpp
index 591d4ed47..521562fe6 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -463,7 +463,7 @@ void CDBEnv::Flush(bool fShutdown)
             else
                 mi++;
         }
-        LogPrint("db", "DBFlush(%s)%s ended %15"PRId64"ms\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started", GetTimeMillis() - nStart);
+        LogPrint("db", "DBFlush(%s)%s ended %15dms\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started", GetTimeMillis() - nStart);
         if (fShutdown)
         {
             char** listp;
diff --git a/src/init.cpp b/src/init.cpp
index 4cc04f520..4cc18800a 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -599,7 +599,7 @@ bool AppInit2(boost::thread_group& threadGroup)
         {
             // try moving the database env out of the way
             boost::filesystem::path pathDatabase = GetDataDir() / "database";
-            boost::filesystem::path pathDatabaseBak = GetDataDir() / strprintf("database.%"PRId64".bak", GetTime());
+            boost::filesystem::path pathDatabaseBak = GetDataDir() / strprintf("database.%d.bak", GetTime());
             try {
                 boost::filesystem::rename(pathDatabase, pathDatabaseBak);
                 LogPrintf("Moved old %s to %s. Retrying.\n", pathDatabase.string(), pathDatabaseBak.string());
@@ -874,7 +874,7 @@ bool AppInit2(boost::thread_group& threadGroup)
         LogPrintf("Shutdown requested. Exiting.\n");
         return false;
     }
-    LogPrintf(" block index %15"PRId64"ms\n", GetTimeMillis() - nStart);
+    LogPrintf(" block index %15dms\n", GetTimeMillis() - nStart);
 
     if (GetBoolArg("-printblockindex", false) || GetBoolArg("-printblocktree", false))
     {
@@ -985,7 +985,7 @@ bool AppInit2(boost::thread_group& threadGroup)
         }
 
         LogPrintf("%s", strErrors.str());
-        LogPrintf(" wallet      %15"PRId64"ms\n", GetTimeMillis() - nStart);
+        LogPrintf(" wallet      %15dms\n", GetTimeMillis() - nStart);
 
         RegisterWallet(pwalletMain);
 
@@ -1007,7 +1007,7 @@ bool AppInit2(boost::thread_group& threadGroup)
             LogPrintf("Rescanning last %i blocks (from block %i)...\n", chainActive.Height() - pindexRescan->nHeight, pindexRescan->nHeight);
             nStart = GetTimeMillis();
             pwalletMain->ScanForWalletTransactions(pindexRescan, true);
-            LogPrintf(" rescan      %15"PRId64"ms\n", GetTimeMillis() - nStart);
+            LogPrintf(" rescan      %15dms\n", GetTimeMillis() - nStart);
             pwalletMain->SetBestChain(chainActive.GetLocator());
             nWalletDBUpdated++;
         }
@@ -1042,7 +1042,7 @@ bool AppInit2(boost::thread_group& threadGroup)
             LogPrintf("Invalid or missing peers.dat; recreating\n");
     }
 
-    LogPrintf("Loaded %i addresses from peers.dat  %"PRId64"ms\n",
+    LogPrintf("Loaded %i addresses from peers.dat  %dms\n",
            addrman.size(), GetTimeMillis() - nStart);
 
     // ********************************************************* Step 11: start node
diff --git a/src/main.cpp b/src/main.cpp
index 53b99101d..8a5b659e7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -822,7 +822,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         // Don't accept it if it can't get into a block
         int64_t txMinFee = GetMinFee(tx, nSize, true, GMF_RELAY);
         if (fLimitFree && nFees < txMinFee)
-            return state.DoS(0, error("AcceptToMemoryPool : not enough fees %s, %"PRId64" < %"PRId64,
+            return state.DoS(0, error("AcceptToMemoryPool : not enough fees %s, %d < %d",
                                       hash.ToString(), nFees, txMinFee),
                              REJECT_INSUFFICIENTFEE, "insufficient fee");
 
@@ -851,7 +851,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         }
 
         if (fRejectInsaneFee && nFees > CTransaction::nMinRelayTxFee * 10000)
-            return error("AcceptToMemoryPool: : insane fees %s, %"PRId64" > %"PRId64,
+            return error("AcceptToMemoryPool: : insane fees %s, %d > %d",
                          hash.ToString(),
                          nFees, CTransaction::nMinRelayTxFee * 10000);
 
@@ -1168,7 +1168,7 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
 
     // Limit adjustment step
     int64_t nActualTimespan = pindexLast->GetBlockTime() - pindexFirst->GetBlockTime();
-    LogPrintf("  nActualTimespan = %"PRId64"  before bounds\n", nActualTimespan);
+    LogPrintf("  nActualTimespan = %d  before bounds\n", nActualTimespan);
     if (nActualTimespan < nTargetTimespan/4)
         nActualTimespan = nTargetTimespan/4;
     if (nActualTimespan > nTargetTimespan*4)
@@ -1185,7 +1185,7 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
 
     /// debug print
     LogPrintf("GetNextWorkRequired RETARGET\n");
-    LogPrintf("nTargetTimespan = %"PRId64"    nActualTimespan = %"PRId64"\n", nTargetTimespan, nActualTimespan);
+    LogPrintf("nTargetTimespan = %d    nActualTimespan = %d\n", nTargetTimespan, nActualTimespan);
     LogPrintf("Before: %08x  %s\n", pindexLast->nBits, CBigNum().SetCompact(pindexLast->nBits).getuint256().ToString());
     LogPrintf("After:  %08x  %s\n", bnNew.GetCompact(), bnNew.getuint256().ToString());
 
@@ -1737,7 +1737,7 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C
 
     if (block.vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
         return state.DoS(100,
-                         error("ConnectBlock() : coinbase pays too much (actual=%"PRId64" vs limit=%"PRId64")",
+                         error("ConnectBlock() : coinbase pays too much (actual=%d vs limit=%d)",
                                block.vtx[0].GetValueOut(), GetBlockValue(pindex->nHeight, nFees)),
                          REJECT_INVALID, "bad-cb-amount");
 
@@ -3014,7 +3014,7 @@ bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
         AbortNode(_("Error: system error: ") + e.what());
     }
     if (nLoaded > 0)
-        LogPrintf("Loaded %i blocks from external file in %"PRId64"ms\n", nLoaded, GetTimeMillis() - nStart);
+        LogPrintf("Loaded %i blocks from external file in %dms\n", nLoaded, GetTimeMillis() - nStart);
     return nLoaded > 0;
 }
 
@@ -3804,7 +3804,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
         }
 
         if (!(sProblem.empty())) {
-            LogPrint("net", "pong %s %s: %s, %"PRIx64" expected, %"PRIx64" received, %"PRIszu" bytes\n",
+            LogPrint("net", "pong %s %s: %s, %x expected, %x received, %"PRIszu" bytes\n",
                 pfrom->addr.ToString(),
                 pfrom->cleanSubVer,
                 sProblem,
diff --git a/src/miner.cpp b/src/miner.cpp
index 73dd0a749..e52f53908 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -319,7 +319,7 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
 
         nLastBlockTx = nBlockTx;
         nLastBlockSize = nBlockSize;
-        LogPrintf("CreateNewBlock(): total size %"PRIu64"\n", nBlockSize);
+        LogPrintf("CreateNewBlock(): total size %u\n", nBlockSize);
 
         pblock->vtx[0].vout[0].nValue = GetBlockValue(pindexPrev->nHeight+1, nFees);
         pblocktemplate->vTxFees[0] = -nFees;
diff --git a/src/net.cpp b/src/net.cpp
index 359e62929..bb1d1bac4 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1243,7 +1243,7 @@ void DumpAddresses()
     CAddrDB adb;
     adb.Write(addrman);
 
-    LogPrint("net", "Flushed %d addresses to peers.dat  %"PRId64"ms\n",
+    LogPrint("net", "Flushed %d addresses to peers.dat  %dms\n",
            addrman.size(), GetTimeMillis() - nStart);
 }
 
diff --git a/src/net.h b/src/net.h
index da590f89e..8a7531d61 100644
--- a/src/net.h
+++ b/src/net.h
@@ -423,7 +423,7 @@ public:
             nRequestTime = it->second;
         else
             nRequestTime = 0;
-        LogPrint("net", "askfor %s   %"PRId64" (%s)\n", inv.ToString().c_str(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000).c_str());
+        LogPrint("net", "askfor %s   %d (%s)\n", inv.ToString().c_str(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000).c_str());
 
         // Make sure not to reuse time indexes to keep things in the same order
         int64_t nNow = (GetTime() - 1) * 1000000;
diff --git a/src/rpcnet.cpp b/src/rpcnet.cpp
index 738b966b8..efe4f54b0 100644
--- a/src/rpcnet.cpp
+++ b/src/rpcnet.cpp
@@ -119,7 +119,7 @@ Value getpeerinfo(const Array& params, bool fHelp)
         obj.push_back(Pair("addr", stats.addrName));
         if (!(stats.addrLocal.empty()))
             obj.push_back(Pair("addrlocal", stats.addrLocal));
-        obj.push_back(Pair("services", strprintf("%08"PRIx64, stats.nServices)));
+        obj.push_back(Pair("services", strprintf("%08x", stats.nServices)));
         obj.push_back(Pair("lastsend", (boost::int64_t)stats.nLastSend));
         obj.push_back(Pair("lastrecv", (boost::int64_t)stats.nLastRecv));
         obj.push_back(Pair("bytessent", (boost::int64_t)stats.nSendBytes));
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
index 691f02a9d..706737b11 100644
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -311,9 +311,9 @@ BOOST_AUTO_TEST_CASE(strprintf_numbers)
 {
     int64_t s64t = -9223372036854775807LL; /* signed 64 bit test value */
     uint64_t u64t = 18446744073709551615ULL; /* unsigned 64 bit test value */
-    BOOST_CHECK(strprintf("%s %"PRId64" %s", B, s64t, E) == B" -9223372036854775807 "E);
-    BOOST_CHECK(strprintf("%s %"PRIu64" %s", B, u64t, E) == B" 18446744073709551615 "E);
-    BOOST_CHECK(strprintf("%s %"PRIx64" %s", B, u64t, E) == B" ffffffffffffffff "E);
+    BOOST_CHECK(strprintf("%s %d %s", B, s64t, E) == B" -9223372036854775807 "E);
+    BOOST_CHECK(strprintf("%s %u %s", B, u64t, E) == B" 18446744073709551615 "E);
+    BOOST_CHECK(strprintf("%s %x %s", B, u64t, E) == B" ffffffffffffffff "E);
 
     size_t st = 12345678; /* unsigned size_t test value */
     ssize_t sst = -12345678; /* signed size_t test value */
diff --git a/src/util.cpp b/src/util.cpp
index 8cfd1c2e0..4e326ffcf 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -330,7 +330,7 @@ string FormatMoney(int64_t n, bool fPlus)
     int64_t n_abs = (n > 0 ? n : -n);
     int64_t quotient = n_abs/COIN;
     int64_t remainder = n_abs%COIN;
-    string str = strprintf("%"PRId64".%08"PRId64, quotient, remainder);
+    string str = strprintf("%d.%08d", quotient, remainder);
 
     // Right-trim excess zeros before the decimal point:
     int nTrim = 0;
@@ -1278,7 +1278,7 @@ void AddTimeData(const CNetAddr& ip, int64_t nTime)
     // Add data
     static CMedianFilter<int64_t> vTimeOffsets(200,0);
     vTimeOffsets.input(nOffsetSample);
-    LogPrintf("Added time data, samples %d, offset %+"PRId64" (%+"PRId64" minutes)\n", vTimeOffsets.size(), nOffsetSample, nOffsetSample/60);
+    LogPrintf("Added time data, samples %d, offset %+d (%+d minutes)\n", vTimeOffsets.size(), nOffsetSample, nOffsetSample/60);
     if (vTimeOffsets.size() >= 5 && vTimeOffsets.size() % 2 == 1)
     {
         int64_t nMedian = vTimeOffsets.median();
@@ -1313,10 +1313,10 @@ void AddTimeData(const CNetAddr& ip, int64_t nTime)
         }
         if (fDebug) {
             BOOST_FOREACH(int64_t n, vSorted)
-                LogPrintf("%+"PRId64"  ", n);
+                LogPrintf("%+d  ", n);
             LogPrintf("|  ");
         }
-        LogPrintf("nTimeOffset = %+"PRId64"  (%+"PRId64" minutes)\n", nTimeOffset, nTimeOffset/60);
+        LogPrintf("nTimeOffset = %+d  (%+d minutes)\n", nTimeOffset, nTimeOffset/60);
     }
 }
 
diff --git a/src/util.h b/src/util.h
index 6ef93021f..c28380a59 100644
--- a/src/util.h
+++ b/src/util.h
@@ -44,15 +44,10 @@ static const int64_t CENT = 1000000;
 #define UEND(a)             ((unsigned char*)&((&(a))[1]))
 #define ARRAYLEN(array)     (sizeof(array)/sizeof((array)[0]))
 
-/* Format characters for (s)size_t, ptrdiff_t, uint64_t.
+/* Format characters for (s)size_t, ptrdiff_t.
  *
- * As the tinyformat-based formatting system is type-safe, no special format
- * characters are really needed to specify sizes. Tinyformat can support
- * (ignores) the C99 prefixes such as "ll" but chokes on MSVC's inttypes
- * defines prefixes such as "I64X".  So don't include inttypes.h and define our
- * own for compatibility.
- * If you get a warning here about a redefine of PRI?64, make sure that
- * inttypes.h is not included.
+ * Define these as empty as the tinyformat-based formatting system is
+ * type-safe, no special format characters are needed to specify sizes.
  */
 #define PRIszx    "x"
 #define PRIszu    "u"
@@ -60,9 +55,6 @@ static const int64_t CENT = 1000000;
 #define PRIpdx    "x"
 #define PRIpdu    "u"
 #define PRIpdd    "d"
-#define PRIx64    "x"
-#define PRIu64    "u"
-#define PRId64    "d"
 
 // This is needed because the foreach macro can't get over the comma in pair<t1, t2>
 #define PAIRTYPE(t1, t2)    std::pair<t1, t2>
@@ -234,7 +226,7 @@ void runCommand(std::string strCommand);
 
 inline std::string i64tostr(int64_t n)
 {
-    return strprintf("%"PRId64, n);
+    return strprintf("%d", n);
 }
 
 inline std::string itostr(int n)
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 5e24738b5..eaf0b9846 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -1698,7 +1698,7 @@ bool CWallet::NewKeyPool()
             walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
             setKeyPool.insert(nIndex);
         }
-        LogPrintf("CWallet::NewKeyPool wrote %"PRId64" new keys\n", nKeys);
+        LogPrintf("CWallet::NewKeyPool wrote %d new keys\n", nKeys);
     }
     return true;
 }
@@ -1728,7 +1728,7 @@ bool CWallet::TopUpKeyPool(unsigned int kpSize)
             if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
                 throw runtime_error("TopUpKeyPool() : writing generated key failed");
             setKeyPool.insert(nEnd);
-            LogPrintf("keypool added key %"PRId64", size=%"PRIszu"\n", nEnd, setKeyPool.size());
+            LogPrintf("keypool added key %d, size=%"PRIszu"\n", nEnd, setKeyPool.size());
         }
     }
     return true;
@@ -1757,7 +1757,7 @@ void CWallet::ReserveKeyFromKeyPool(int64_t& nIndex, CKeyPool& keypool)
         if (!HaveKey(keypool.vchPubKey.GetID()))
             throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
         assert(keypool.vchPubKey.IsValid());
-        LogPrintf("keypool reserve %"PRId64"\n", nIndex);
+        LogPrintf("keypool reserve %d\n", nIndex);
     }
 }
 
@@ -1784,7 +1784,7 @@ void CWallet::KeepKey(int64_t nIndex)
         CWalletDB walletdb(strWalletFile);
         walletdb.ErasePool(nIndex);
     }
-    LogPrintf("keypool keep %"PRId64"\n", nIndex);
+    LogPrintf("keypool keep %d\n", nIndex);
 }
 
 void CWallet::ReturnKey(int64_t nIndex)
@@ -1794,7 +1794,7 @@ void CWallet::ReturnKey(int64_t nIndex)
         LOCK(cs_wallet);
         setKeyPool.insert(nIndex);
     }
-    LogPrintf("keypool return %"PRId64"\n", nIndex);
+    LogPrintf("keypool return %d\n", nIndex);
 }
 
 bool CWallet::GetKeyFromPool(CPubKey& result)
diff --git a/src/walletdb.cpp b/src/walletdb.cpp
index b5b523740..b57ea0b51 100644
--- a/src/walletdb.cpp
+++ b/src/walletdb.cpp
@@ -383,7 +383,7 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
             pwallet->AddToWallet(wtx, true);
             //// debug print
             //LogPrintf("LoadWallet  %s\n", wtx.GetHash().ToString());
-            //LogPrintf(" %12"PRId64"  %s  %s  %s\n",
+            //LogPrintf(" %12d  %s  %s  %s\n",
             //    wtx.vout[0].nValue,
             //    DateTimeStrFormat("%Y-%m-%d %H:%M:%S", wtx.GetBlockTime()),
             //    wtx.hashBlock.ToString(),
@@ -816,7 +816,7 @@ void ThreadFlushWalletDB(const string& strFile)
                         bitdb.CheckpointLSN(strFile);
 
                         bitdb.mapFileUseCount.erase(mi++);
-                        LogPrint("db", "Flushed wallet.dat %"PRId64"ms\n", GetTimeMillis() - nStart);
+                        LogPrint("db", "Flushed wallet.dat %dms\n", GetTimeMillis() - nStart);
                     }
                 }
             }
@@ -877,7 +877,7 @@ bool CWalletDB::Recover(CDBEnv& dbenv, std::string filename, bool fOnlyKeys)
     // Set -rescan so any missing transactions will be
     // found.
     int64_t now = GetTime();
-    std::string newFilename = strprintf("wallet.%"PRId64".bak", now);
+    std::string newFilename = strprintf("wallet.%d.bak", now);
 
     int result = dbenv.dbenv.dbrename(NULL, filename.c_str(), NULL,
                                       newFilename.c_str(), DB_AUTO_COMMIT);