diff --git a/src/bench/mempool_eviction.cpp b/src/bench/mempool_eviction.cpp
index 5790d51a8..1b2d23862 100644
--- a/src/bench/mempool_eviction.cpp
+++ b/src/bench/mempool_eviction.cpp
@@ -97,7 +97,7 @@ static void MempoolEviction(benchmark::State& state)
     tx7.vout[1].scriptPubKey = CScript() << OP_7 << OP_EQUAL;
     tx7.vout[1].nValue = 10 * COIN;
 
-    CTxMemPool pool(CFeeRate(1000));
+    CTxMemPool pool;
 
     while (state.KeepRunning()) {
         AddTx(tx1, 10000LL, pool);
diff --git a/src/test/blockencodings_tests.cpp b/src/test/blockencodings_tests.cpp
index e3876e969..09fab59ba 100644
--- a/src/test/blockencodings_tests.cpp
+++ b/src/test/blockencodings_tests.cpp
@@ -55,7 +55,7 @@ static CBlock BuildBlockTestCase() {
 
 BOOST_AUTO_TEST_CASE(SimpleRoundTripTest)
 {
-    CTxMemPool pool(CFeeRate(0));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     CBlock block(BuildBlockTestCase());
 
@@ -154,7 +154,7 @@ public:
 
 BOOST_AUTO_TEST_CASE(NonCoinbasePreforwardRTTest)
 {
-    CTxMemPool pool(CFeeRate(0));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     CBlock block(BuildBlockTestCase());
 
@@ -220,7 +220,7 @@ BOOST_AUTO_TEST_CASE(NonCoinbasePreforwardRTTest)
 
 BOOST_AUTO_TEST_CASE(SufficientPreforwardRTTest)
 {
-    CTxMemPool pool(CFeeRate(0));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     CBlock block(BuildBlockTestCase());
 
@@ -270,7 +270,7 @@ BOOST_AUTO_TEST_CASE(SufficientPreforwardRTTest)
 
 BOOST_AUTO_TEST_CASE(EmptyBlockRoundTripTest)
 {
-    CTxMemPool pool(CFeeRate(0));
+    CTxMemPool pool;
     CMutableTransaction coinbase;
     coinbase.vin.resize(1);
     coinbase.vin[0].scriptSig.resize(10);
diff --git a/src/test/mempool_tests.cpp b/src/test/mempool_tests.cpp
index 91f549fe4..54298b16f 100644
--- a/src/test/mempool_tests.cpp
+++ b/src/test/mempool_tests.cpp
@@ -54,7 +54,7 @@ BOOST_AUTO_TEST_CASE(MempoolRemoveTest)
     }
 
 
-    CTxMemPool testPool(CFeeRate(0));
+    CTxMemPool testPool;
 
     // Nothing in pool, remove should do nothing:
     unsigned int poolSize = testPool.size();
@@ -118,7 +118,7 @@ void CheckSort(CTxMemPool &pool, std::vector<std::string> &sortedOrder)
 
 BOOST_AUTO_TEST_CASE(MempoolIndexingTest)
 {
-    CTxMemPool pool(CFeeRate(0));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
 
     /* 3rd highest fee */
@@ -320,7 +320,7 @@ BOOST_AUTO_TEST_CASE(MempoolIndexingTest)
 
 BOOST_AUTO_TEST_CASE(MempoolAncestorIndexingTest)
 {
-    CTxMemPool pool(CFeeRate(0));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
 
     /* 3rd highest fee */
@@ -432,7 +432,7 @@ BOOST_AUTO_TEST_CASE(MempoolAncestorIndexingTest)
 
 BOOST_AUTO_TEST_CASE(MempoolSizeLimitTest)
 {
-    CTxMemPool pool(CFeeRate(1000));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     entry.dPriority = 10.0;
 
diff --git a/src/test/policyestimator_tests.cpp b/src/test/policyestimator_tests.cpp
index 0c060801b..f74fddf53 100644
--- a/src/test/policyestimator_tests.cpp
+++ b/src/test/policyestimator_tests.cpp
@@ -16,7 +16,7 @@ BOOST_FIXTURE_TEST_SUITE(policyestimator_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(BlockPolicyEstimates)
 {
-    CTxMemPool mpool(CFeeRate(1000));
+    CTxMemPool mpool;
     TestMemPoolEntryHelper entry;
     CAmount basefee(2000);
     CAmount deltaFee(100);
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index e3d4eff60..ac0cb6044 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -348,7 +348,7 @@ void CTxMemPoolEntry::UpdateAncestorState(int64_t modifySize, CAmount modifyFee,
     assert(int(nSigOpCostWithAncestors) >= 0);
 }
 
-CTxMemPool::CTxMemPool(const CFeeRate& _minReasonableRelayFee) :
+CTxMemPool::CTxMemPool() :
     nTransactionsUpdated(0)
 {
     _clear(); //lock free clear
diff --git a/src/txmempool.h b/src/txmempool.h
index ffb1c1309..394337fe8 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -502,7 +502,7 @@ public:
 
     /** Create a new CTxMemPool.
      */
-    CTxMemPool(const CFeeRate& _minReasonableRelayFee);
+    CTxMemPool();
     ~CTxMemPool();
 
     /**
diff --git a/src/validation.cpp b/src/validation.cpp
index 2ad3dadeb..a9b8d1b92 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -83,7 +83,7 @@ uint256 hashAssumeValid;
 CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
 CAmount maxTxFee = DEFAULT_TRANSACTION_MAXFEE;
 
-CTxMemPool mempool(::minRelayTxFee);
+CTxMemPool mempool;
 
 static void CheckBlockIndex(const Consensus::Params& consensusParams);