diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -306,8 +306,8 @@
     uint256 hash = ParseHashStr(request.params[0].get_str(), "txid");
     Amount nAmount = request.params[2].get_int64() * SATOSHI;
 
-    g_mempool.PrioritiseTransaction(hash, request.params[0].get_str(),
-                                    request.params[1].get_real(), nAmount);
+    g_mempool.PrioritiseTransaction(hash, request.params[1].get_real(),
+                                    nAmount);
     return true;
 }
 
diff --git a/src/txmempool.h b/src/txmempool.h
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -625,8 +625,8 @@
     bool HasNoInputsOf(const CTransaction &tx) const;
 
     /** Affect CreateNewBlock prioritisation of transactions */
-    void PrioritiseTransaction(const uint256 hash, const std::string strHash,
-                               double dPriorityDelta, const Amount nFeeDelta);
+    void PrioritiseTransaction(const uint256 &hash, double dPriorityDelta,
+                               const Amount nFeeDelta);
     void ApplyDeltas(const uint256 hash, double &dPriorityDelta,
                      Amount &nFeeDelta) const;
     void ClearPrioritisation(const uint256 hash);
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -963,8 +963,7 @@
     return std::max(GetConfig().GetMinFeePerKB(), GetMinFee(maxMempoolSize));
 }
 
-void CTxMemPool::PrioritiseTransaction(const uint256 hash,
-                                       const std::string strHash,
+void CTxMemPool::PrioritiseTransaction(const uint256 &hash,
                                        double dPriorityDelta,
                                        const Amount nFeeDelta) {
     {
@@ -996,8 +995,8 @@
             }
         }
     }
-    LogPrintf("PrioritiseTransaction: %s priority += %f, fee += %d\n", strHash,
-              dPriorityDelta, FormatMoney(nFeeDelta));
+    LogPrintf("PrioritiseTransaction: %s priority += %f, fee += %d\n",
+              hash.ToString(), dPriorityDelta, FormatMoney(nFeeDelta));
 }
 
 void CTxMemPool::ApplyDeltas(const uint256 hash, double &dPriorityDelta,
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5596,9 +5596,8 @@
 
             Amount amountdelta = nFeeDelta * SATOSHI;
             if (amountdelta != Amount::zero()) {
-                g_mempool.PrioritiseTransaction(tx->GetId(),
-                                                tx->GetId().ToString(),
-                                                prioritydummy, amountdelta);
+                g_mempool.PrioritiseTransaction(tx->GetId(), prioritydummy,
+                                                amountdelta);
             }
             CValidationState state;
             if (nTime + nExpiryTimeout > nNow) {
@@ -5622,8 +5621,7 @@
         file >> mapDeltas;
 
         for (const auto &i : mapDeltas) {
-            g_mempool.PrioritiseTransaction(i.first, i.first.ToString(),
-                                            prioritydummy, i.second);
+            g_mempool.PrioritiseTransaction(i.first, prioritydummy, i.second);
         }
     } catch (const std::exception &e) {
         LogPrintf("Failed to deserialize mempool data on disk: %s. Continuing "