diff --git a/src/Makefile.am b/src/Makefile.am
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -177,7 +177,6 @@
   rpc/protocol.h \
   rpc/rawtransaction.h \
   rpc/server.h \
-  rpc/tojson.h \
   rpc/register.h \
   rpc/util.h \
   rwcollection.h \
diff --git a/src/rest.cpp b/src/rest.cpp
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -12,7 +12,6 @@
 #include <primitives/transaction.h>
 #include <rpc/blockchain.h>
 #include <rpc/server.h>
-#include <rpc/tojson.h>
 #include <streams.h>
 #include <sync.h>
 #include <txmempool.h>
diff --git a/src/rpc/blockchain.h b/src/rpc/blockchain.h
--- a/src/rpc/blockchain.h
+++ b/src/rpc/blockchain.h
@@ -7,6 +7,7 @@
 
 #include <univalue.h>
 
+class CBlock;
 class CBlockIndex;
 class Config;
 class JSONRPCRequest;
@@ -15,4 +16,9 @@
 
 double GetDifficulty(const CBlockIndex *blockindex);
 
+UniValue blockToJSON(const Config &config, const CBlock &block,
+                     const CBlockIndex *blockindex, bool txDetails = false);
+
+UniValue blockheaderToJSON(const CBlockIndex *blockindex);
+
 #endif // BITCOIN_RPCBLOCKCHAIN_H
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -18,7 +18,6 @@
 #include <primitives/transaction.h>
 #include <rpc/rawtransaction.h>
 #include <rpc/server.h>
-#include <rpc/tojson.h>
 #include <script/script.h>
 #include <script/script_error.h>
 #include <script/sign.h>
@@ -35,8 +34,8 @@
 
 #include <univalue.h>
 
-void TxToJSON(const CTransaction &tx, const uint256 hashBlock,
-              UniValue &entry) {
+static void TxToJSON(const CTransaction &tx, const uint256 hashBlock,
+                     UniValue &entry) {
     // Call into TxToUniv() in bitcoin-common to decode the transaction hex.
     //
     // Blockchain contextual information (confirmations and blocktime) is not
diff --git a/src/rpc/tojson.h b/src/rpc/tojson.h
deleted file mode 100644
--- a/src/rpc/tojson.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright (c) 2017 The Bitcoin developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef BITCOIN_RPCTOJSON_H
-#define BITCOIN_RPCTOJSON_H
-
-#include <uint256.h>
-
-#include <univalue.h>
-
-class CScript;
-
-void TxToJSON(const Config &config, const CTransaction &tx,
-              const uint256 hashBlock, UniValue &entry);
-UniValue blockToJSON(const Config &config, const CBlock &block,
-                     const CBlockIndex *blockindex, bool txDetails = false);
-UniValue blockheaderToJSON(const CBlockIndex *blockindex);
-
-#endif // BITCOIN_RPCTOJSON_H