diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index ca7021443e..d18182c07d 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -332,7 +332,7 @@ void CTxMemPoolEntry::UpdateAncestorState(int64_t modifySize, CAmount modifyFee,
 }
 
 CTxMemPool::CTxMemPool(CBlockPolicyEstimator* estimator, int check_ratio)
-    : m_check_ratio(check_ratio), nTransactionsUpdated(0), minerPolicyEstimator(estimator), m_epoch(0), m_has_epoch_guard(false)
+    : m_check_ratio(check_ratio), minerPolicyEstimator(estimator)
 {
     _clear(); //lock free clear
 }
diff --git a/src/txmempool.h b/src/txmempool.h
index da071576ac..78ad62aae6 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -489,7 +489,7 @@ class CTxMemPool
 {
 private:
     const int m_check_ratio; //!< Value n means that 1 times in n we check.
-    std::atomic<unsigned int> nTransactionsUpdated; //!< Used by getblocktemplate to trigger CreateNewBlock() invocation
+    std::atomic<unsigned int> nTransactionsUpdated{0}; //!< Used by getblocktemplate to trigger CreateNewBlock() invocation
     CBlockPolicyEstimator* minerPolicyEstimator;
 
     uint64_t totalTxSize;      //!< sum of all mempool tx's virtual sizes. Differs from serialized tx size since witness data is discounted. Defined in BIP 141.
@@ -498,8 +498,8 @@ private:
     mutable int64_t lastRollingFeeUpdate;
     mutable bool blockSinceLastRollingFeeBump;
     mutable double rollingMinimumFeeRate; //!< minimum fee to get into the pool, decreases exponentially
-    mutable uint64_t m_epoch;
-    mutable bool m_has_epoch_guard;
+    mutable uint64_t m_epoch{0};
+    mutable bool m_has_epoch_guard{false};
 
     // In-memory counter for external mempool tracking purposes.
     // This number is incremented once every time a transaction