diff --git a/src/addrdb.cpp b/src/addrdb.cpp
index 224d3921ccb..2c242538537 100644
--- a/src/addrdb.cpp
+++ b/src/addrdb.cpp
@@ -8,13 +8,13 @@
 #include "addrman.h"
 #include "chainparams.h"
 #include "clientversion.h"
+#include "fs.h"
 #include "hash.h"
 #include "random.h"
 #include "streams.h"
 #include "tinyformat.h"
 #include "util.h"
 
-#include <boost/filesystem.hpp>
 
 CBanDB::CBanDB()
 {
diff --git a/src/addrdb.h b/src/addrdb.h
index ab985b10cb2..f68845f879f 100644
--- a/src/addrdb.h
+++ b/src/addrdb.h
@@ -6,11 +6,11 @@
 #ifndef BITCOIN_ADDRDB_H
 #define BITCOIN_ADDRDB_H
 
+#include "fs.h"
 #include "serialize.h"
 
 #include <string>
 #include <map>
-#include <boost/filesystem/path.hpp>
 
 class CSubNet;
 class CAddrMan;
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index ed8ca7e14c5..4d81ae62d0b 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -9,12 +9,12 @@
 
 #include "chainparamsbase.h"
 #include "clientversion.h"
+#include "fs.h"
 #include "rpc/client.h"
 #include "rpc/protocol.h"
 #include "util.h"
 #include "utilstrencodings.h"
 
-#include <boost/filesystem/operations.hpp>
 #include <stdio.h>
 
 #include <event2/buffer.h>
diff --git a/src/bitcoind.cpp b/src/bitcoind.cpp
index a3d02afcdbe..45502e02ee6 100644
--- a/src/bitcoind.cpp
+++ b/src/bitcoind.cpp
@@ -10,6 +10,7 @@
 #include "chainparams.h"
 #include "clientversion.h"
 #include "compat.h"
+#include "fs.h"
 #include "rpc/server.h"
 #include "init.h"
 #include "noui.h"
@@ -20,7 +21,6 @@
 #include "utilstrencodings.h"
 
 #include <boost/algorithm/string/predicate.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 #include <stdio.h>
diff --git a/src/dbwrapper.cpp b/src/dbwrapper.cpp
index 01fcd07420f..d2acfe24167 100644
--- a/src/dbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -4,11 +4,10 @@
 
 #include "dbwrapper.h"
 
+#include "fs.h"
 #include "util.h"
 #include "random.h"
 
-#include <boost/filesystem.hpp>
-
 #include <leveldb/cache.h>
 #include <leveldb/env.h>
 #include <leveldb/filter_policy.h>
diff --git a/src/dbwrapper.h b/src/dbwrapper.h
index 414df76a7ca..a6e3ba1656c 100644
--- a/src/dbwrapper.h
+++ b/src/dbwrapper.h
@@ -6,14 +6,13 @@
 #define BITCOIN_DBWRAPPER_H
 
 #include "clientversion.h"
+#include "fs.h"
 #include "serialize.h"
 #include "streams.h"
 #include "util.h"
 #include "utilstrencodings.h"
 #include "version.h"
 
-#include <boost/filesystem/path.hpp>
-
 #include <leveldb/db.h>
 #include <leveldb/write_batch.h>
 
diff --git a/src/init.cpp b/src/init.cpp
index 23a15b4fd8a..39cff2316f1 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -16,6 +16,7 @@
 #include "checkpoints.h"
 #include "compat/sanity.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "httpserver.h"
 #include "httprpc.h"
 #include "key.h"
@@ -56,7 +57,6 @@
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/split.hpp>
 #include <boost/bind.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/function.hpp>
 #include <boost/interprocess/sync/file_lock.hpp>
 #include <boost/thread.hpp>
diff --git a/src/net.h b/src/net.h
index 3bbe3861736..0fb0ad50396 100644
--- a/src/net.h
+++ b/src/net.h
@@ -11,6 +11,7 @@
 #include "amount.h"
 #include "bloom.h"
 #include "compat.h"
+#include "fs.h"
 #include "hash.h"
 #include "limitedmap.h"
 #include "netaddress.h"
@@ -32,7 +33,6 @@
 #include <arpa/inet.h>
 #endif
 
-#include <boost/filesystem/path.hpp>
 #include <boost/foreach.hpp>
 #include <boost/signals2/signal.hpp>
 
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 05a3bd71fdc..c0cdad3b1e0 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -10,6 +10,7 @@
 
 #include "chainparams.h"
 #include "clientmodel.h"
+#include "fs.h"
 #include "guiconstants.h"
 #include "guiutil.h"
 #include "intro.h"
@@ -38,7 +39,6 @@
 
 #include <stdint.h>
 
-#include <boost/filesystem/operations.hpp>
 #include <boost/thread.hpp>
 
 #include <QApplication>
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index bb5b2d43470..bebba259d0d 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -9,6 +9,7 @@
 #include "qvalidatedlineedit.h"
 #include "walletmodel.h"
 
+#include "fs.h"
 #include "primitives/transaction.h"
 #include "init.h"
 #include "policy/policy.h"
@@ -35,9 +36,6 @@
 #include "shlwapi.h"
 #endif
 
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
-#include <boost/filesystem/detail/utf8_codecvt_facet.hpp>
 #include <boost/scoped_array.hpp>
 
 #include <QAbstractItemView>
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index 913aa5e24bf..afe21661543 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -6,6 +6,7 @@
 #define BITCOIN_QT_GUIUTIL_H
 
 #include "amount.h"
+#include "fs.h"
 
 #include <QEvent>
 #include <QHeaderView>
@@ -16,8 +17,6 @@
 #include <QTableView>
 #include <QLabel>
 
-#include <boost/filesystem.hpp>
-
 class QValidatedLineEdit;
 class SendCoinsRecipient;
 
diff --git a/src/qt/intro.cpp b/src/qt/intro.cpp
index 4939648ff0b..bafdfc917e8 100644
--- a/src/qt/intro.cpp
+++ b/src/qt/intro.cpp
@@ -6,6 +6,7 @@
 #include "config/bitcoin-config.h"
 #endif
 
+#include "fs.h"
 #include "intro.h"
 #include "ui_intro.h"
 
@@ -13,8 +14,6 @@
 
 #include "util.h"
 
-#include <boost/filesystem.hpp>
-
 #include <QFileDialog>
 #include <QSettings>
 #include <QMessageBox>
diff --git a/src/qt/test/rpcnestedtests.cpp b/src/qt/test/rpcnestedtests.cpp
index a7b82117d83..965f98db33e 100644
--- a/src/qt/test/rpcnestedtests.cpp
+++ b/src/qt/test/rpcnestedtests.cpp
@@ -6,6 +6,7 @@
 
 #include "chainparams.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "validation.h"
 #include "rpc/register.h"
 #include "rpc/server.h"
@@ -17,8 +18,6 @@
 #include <QDir>
 #include <QtGlobal>
 
-#include <boost/filesystem.hpp>
-
 static UniValue rpcNestedTest_rpc(const JSONRPCRequest& request)
 {
     if (request.fHelp) {
diff --git a/src/rpc/protocol.h b/src/rpc/protocol.h
index 85bc4db1017..fa1d8042bcf 100644
--- a/src/rpc/protocol.h
+++ b/src/rpc/protocol.h
@@ -6,11 +6,12 @@
 #ifndef BITCOIN_RPCPROTOCOL_H
 #define BITCOIN_RPCPROTOCOL_H
 
+#include "fs.h"
+
 #include <list>
 #include <map>
 #include <stdint.h>
 #include <string>
-#include <boost/filesystem.hpp>
 
 #include <univalue.h>
 
diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index 141062b3c06..4032c5163c8 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -6,6 +6,7 @@
 #include "rpc/server.h"
 
 #include "base58.h"
+#include "fs.h"
 #include "init.h"
 #include "random.h"
 #include "sync.h"
@@ -16,7 +17,6 @@
 #include <univalue.h>
 
 #include <boost/bind.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
 #include <boost/shared_ptr.hpp>
 #include <boost/signals2/signal.hpp>
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
index abaec45cd7d..4a12277a364 100644
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -7,6 +7,7 @@
 #include "chainparams.h"
 #include "consensus/consensus.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "key.h"
 #include "validation.h"
 #include "miner.h"
@@ -24,7 +25,6 @@
 
 #include <memory>
 
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 FastRandomContext insecure_rand_ctx(true);
diff --git a/src/test/test_bitcoin.h b/src/test/test_bitcoin.h
index a593f136eb6..d67d35a3701 100644
--- a/src/test/test_bitcoin.h
+++ b/src/test/test_bitcoin.h
@@ -6,12 +6,12 @@
 #define BITCOIN_TEST_TEST_BITCOIN_H
 
 #include "chainparamsbase.h"
+#include "fs.h"
 #include "key.h"
 #include "pubkey.h"
 #include "txdb.h"
 #include "txmempool.h"
 
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 /** Basic testing setup.
diff --git a/src/test/testutil.cpp b/src/test/testutil.cpp
index e6d86229796..96ce4db2fe6 100644
--- a/src/test/testutil.cpp
+++ b/src/test/testutil.cpp
@@ -8,7 +8,7 @@
 #include <shlobj.h>
 #endif
 
-#include <boost/filesystem.hpp>
+#include "fs.h"
 
 boost::filesystem::path GetTempPath() {
     return boost::filesystem::temp_directory_path();
diff --git a/src/test/testutil.h b/src/test/testutil.h
index 5875dc50e6c..e2d0de0e26b 100644
--- a/src/test/testutil.h
+++ b/src/test/testutil.h
@@ -8,7 +8,7 @@
 #ifndef BITCOIN_TEST_TESTUTIL_H
 #define BITCOIN_TEST_TESTUTIL_H
 
-#include <boost/filesystem/path.hpp>
+#include "fs.h"
 
 boost::filesystem::path GetTempPath();
 
diff --git a/src/util.cpp b/src/util.cpp
index db45ad1626d..600036eab01 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -10,6 +10,7 @@
 #include "util.h"
 
 #include "chainparamsbase.h"
+#include "fs.h"
 #include "random.h"
 #include "serialize.h"
 #include "sync.h"
@@ -79,8 +80,6 @@
 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
 #include <boost/algorithm/string/join.hpp>
 #include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
 #include <boost/foreach.hpp>
 #include <boost/program_options/detail/config_file.hpp>
 #include <boost/program_options/parsers.hpp>
diff --git a/src/util.h b/src/util.h
index 09481bc01c3..1dbf044105b 100644
--- a/src/util.h
+++ b/src/util.h
@@ -15,6 +15,7 @@
 #endif
 
 #include "compat.h"
+#include "fs.h"
 #include "tinyformat.h"
 #include "utiltime.h"
 
@@ -25,7 +26,6 @@
 #include <string>
 #include <vector>
 
-#include <boost/filesystem/path.hpp>
 #include <boost/signals2/signal.hpp>
 #include <boost/thread/exceptions.hpp>
 
diff --git a/src/validation.cpp b/src/validation.cpp
index 6ade633988a..df6b8e41e75 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -12,6 +12,7 @@
 #include "consensus/consensus.h"
 #include "consensus/merkle.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "hash.h"
 #include "init.h"
 #include "policy/fees.h"
@@ -41,8 +42,6 @@
 
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/join.hpp>
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
 #include <boost/math/distributions/poisson.hpp>
 #include <boost/thread.hpp>
 
diff --git a/src/validation.h b/src/validation.h
index 5f8e9a689c5..0d0bf66ab5e 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -13,6 +13,7 @@
 #include "amount.h"
 #include "chain.h"
 #include "coins.h"
+#include "fs.h"
 #include "protocol.h" // For CMessageHeader::MessageStartChars
 #include "script/script_error.h"
 #include "sync.h"
@@ -30,7 +31,6 @@
 #include <atomic>
 
 #include <boost/unordered_map.hpp>
-#include <boost/filesystem/path.hpp>
 
 class CBlockIndex;
 class CBlockTreeDB;
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
index d3333bf1ab8..825e233b988 100644
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -6,6 +6,7 @@
 #include "db.h"
 
 #include "addrman.h"
+#include "fs.h"
 #include "hash.h"
 #include "protocol.h"
 #include "util.h"
@@ -17,7 +18,6 @@
 #include <sys/stat.h>
 #endif
 
-#include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
 #include <boost/thread.hpp>
 #include <boost/version.hpp>
diff --git a/src/wallet/db.h b/src/wallet/db.h
index 19c54e314c9..b99c3156d63 100644
--- a/src/wallet/db.h
+++ b/src/wallet/db.h
@@ -7,6 +7,7 @@
 #define BITCOIN_WALLET_DB_H
 
 #include "clientversion.h"
+#include "fs.h"
 #include "serialize.h"
 #include "streams.h"
 #include "sync.h"
@@ -16,8 +17,6 @@
 #include <string>
 #include <vector>
 
-#include <boost/filesystem/path.hpp>
-
 #include <db_cxx.h>
 
 static const unsigned int DEFAULT_WALLET_DBLOGSIZE = 100;
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 68d4bc35ee2..ec0432f9cfc 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -11,6 +11,7 @@
 #include "wallet/coincontrol.h"
 #include "consensus/consensus.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "key.h"
 #include "keystore.h"
 #include "validation.h"
@@ -30,7 +31,6 @@
 #include <assert.h>
 
 #include <boost/algorithm/string/replace.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 CWallet* pwalletMain = NULL;
diff --git a/src/wallet/walletdb.cpp b/src/wallet/walletdb.cpp
index 73d79eb4525..a04e35046de 100644
--- a/src/wallet/walletdb.cpp
+++ b/src/wallet/walletdb.cpp
@@ -7,6 +7,7 @@
 
 #include "base58.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "validation.h" // For CheckTransaction
 #include "protocol.h"
 #include "serialize.h"
@@ -18,7 +19,6 @@
 #include <atomic>
 
 #include <boost/version.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
 #include <boost/thread.hpp>