diff --git a/src/validation.cpp b/src/validation.cpp
index 99ce53986f..97ccd467c5 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -1524,7 +1524,11 @@ bool ApplyTxInUndo(const CTxInUndo& undo, CCoinsViewCache& view, const COutPoint
     return fClean;
 }
 
-bool DisconnectBlock(const CBlock& block, CValidationState& state, const CBlockIndex* pindex, CCoinsViewCache& view, bool* pfClean)
+/** Undo the effects of this block (with given index) on the UTXO set represented by coins.
+ *  In case pfClean is provided, operation will try to be tolerant about errors, and *pfClean
+ *  will be true if no problems were found. Otherwise, the return value will be false in case
+ *  of problems. Note that in any case, coins may be modified. */
+static bool DisconnectBlock(const CBlock& block, CValidationState& state, const CBlockIndex* pindex, CCoinsViewCache& view, bool* pfClean = NULL)
 {
     assert(pindex->GetBlockHash() == view.GetBestBlock());
 
@@ -1677,8 +1681,11 @@ static int64_t nTimeIndex = 0;
 static int64_t nTimeCallbacks = 0;
 static int64_t nTimeTotal = 0;
 
-bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pindex,
-                  CCoinsViewCache& view, const CChainParams& chainparams, bool fJustCheck)
+/** Apply the effects of this block (with given index) on the UTXO set represented by coins.
+ *  Validity checks that depend on the UTXO set are also done; ConnectBlock()
+ *  can fail if those validity checks fail (among other reasons). */
+static bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pindex,
+                  CCoinsViewCache& view, const CChainParams& chainparams, bool fJustCheck = false)
 {
     AssertLockHeld(cs_main);
     assert(pindex);
diff --git a/src/validation.h b/src/validation.h
index 4aa10cbb0b..51ea18722c 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -483,18 +483,6 @@ bool CheckBlock(const CBlock& block, CValidationState& state, const Consensus::P
 bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& state, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev, int64_t nAdjustedTime);
 bool ContextualCheckBlock(const CBlock& block, CValidationState& state, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev);
 
-/** Apply the effects of this block (with given index) on the UTXO set represented by coins.
- *  Validity checks that depend on the UTXO set are also done; ConnectBlock()
- *  can fail if those validity checks fail (among other reasons). */
-bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& coins,
-                  const CChainParams& chainparams, bool fJustCheck = false);
-
-/** Undo the effects of this block (with given index) on the UTXO set represented by coins.
- *  In case pfClean is provided, operation will try to be tolerant about errors, and *pfClean
- *  will be true if no problems were found. Otherwise, the return value will be false in case
- *  of problems. Note that in any case, coins may be modified. */
-bool DisconnectBlock(const CBlock& block, CValidationState& state, const CBlockIndex* pindex, CCoinsViewCache& coins, bool* pfClean = NULL);
-
 /** Check a block is completely valid from start to finish (only works on top of our current best block, with cs_main held) */
 bool TestBlockValidity(CValidationState& state, const CChainParams& chainparams, const CBlock& block, CBlockIndex* pindexPrev, bool fCheckPOW = true, bool fCheckMerkleRoot = true);