diff --git a/src/rpc/mempool.cpp b/src/rpc/mempool.cpp
index fa70758a61f..b5373697e7a 100644
--- a/src/rpc/mempool.cpp
+++ b/src/rpc/mempool.cpp
@@ -291,13 +291,14 @@ static void entryToJSON(const CTxMemPool& pool, UniValue& info, const CTxMemPool
     AssertLockHeld(pool.cs);
 
     auto [ancestor_count, ancestor_size, ancestor_fees] = pool.CalculateAncestorData(e);
+    auto [descendant_count, descendant_size, descendant_fees] = pool.CalculateDescendantData(e);
 
     info.pushKV("vsize", (int)e.GetTxSize());
     info.pushKV("weight", (int)e.GetTxWeight());
     info.pushKV("time", count_seconds(e.GetTime()));
     info.pushKV("height", (int)e.GetHeight());
-    info.pushKV("descendantcount", e.GetCountWithDescendants());
-    info.pushKV("descendantsize", e.GetSizeWithDescendants());
+    info.pushKV("descendantcount", descendant_count);
+    info.pushKV("descendantsize", descendant_size);
     info.pushKV("ancestorcount", ancestor_count);
     info.pushKV("ancestorsize", ancestor_size);
     info.pushKV("wtxid", e.GetTx().GetWitnessHash().ToString());
@@ -306,7 +307,7 @@ static void entryToJSON(const CTxMemPool& pool, UniValue& info, const CTxMemPool
     fees.pushKV("base", ValueFromAmount(e.GetFee()));
     fees.pushKV("modified", ValueFromAmount(e.GetModifiedFee()));
     fees.pushKV("ancestor", ValueFromAmount(ancestor_fees));
-    fees.pushKV("descendant", ValueFromAmount(e.GetModFeesWithDescendants()));
+    fees.pushKV("descendant", ValueFromAmount(descendant_fees));
     info.pushKV("fees", std::move(fees));
 
     const CTransaction& tx = e.GetTx();
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index f7bdbf94e3c..ce9218f9111 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -1217,6 +1217,21 @@ std::tuple<size_t, size_t, CAmount> CTxMemPool::CalculateAncestorData(const CTxM
     return {ancestor_count, ancestor_size, ancestor_fees};
 }
 
+std::tuple<size_t, size_t, CAmount> CTxMemPool::CalculateDescendantData(const CTxMemPoolEntry& entry) const
+{
+    auto descendants = m_txgraph->GetDescendants(entry, TxGraph::Level::MAIN);
+    size_t descendant_count = descendants.size();
+    size_t descendant_size = 0;
+    CAmount descendant_fees = 0;
+
+    for (auto tx: descendants) {
+        const CTxMemPoolEntry &desc = static_cast<const CTxMemPoolEntry&>(*tx);
+        descendant_size += desc.GetTxSize();
+        descendant_fees += desc.GetModifiedFee();
+    }
+    return {descendant_count, descendant_size, descendant_fees};
+}
+
 void CTxMemPool::GetTransactionAncestry(const Txid& txid, size_t& ancestors, size_t& descendants, size_t* const ancestorsize, CAmount* const ancestorfees) const {
     LOCK(cs);
     auto it = mapTx.find(txid);
diff --git a/src/txmempool.h b/src/txmempool.h
index b65333cc3b3..49ee510a4f0 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -287,6 +287,7 @@ public:
     uint64_t CalculateDescendantMaximum(txiter entry) const EXCLUSIVE_LOCKS_REQUIRED(cs);
 
     std::tuple<size_t, size_t, CAmount> CalculateAncestorData(const CTxMemPoolEntry& entry) const EXCLUSIVE_LOCKS_REQUIRED(cs);
+    std::tuple<size_t, size_t, CAmount> CalculateDescendantData(const CTxMemPoolEntry& entry) const EXCLUSIVE_LOCKS_REQUIRED(cs);
 
 private:
     typedef std::map<txiter, setEntries, CompareIteratorByHash> cacheMap;