diff --git a/src/masternode.cpp b/src/masternode.cpp
index 39350741f..f8215e681 100644
--- a/src/masternode.cpp
+++ b/src/masternode.cpp
@@ -347,6 +347,8 @@ std::string CMasternode::GetStatus() const
 
 void CMasternode::UpdateLastPaid(const CBlockIndex *pindex, int nMaxBlocksToScanBack)
 {
+    AssertLockHeld(cs_main);
+
     if(!pindex) return;
 
     if (deterministicMNManager->IsDeterministicMNsSporkActive(pindex->nHeight)) {
@@ -354,7 +356,6 @@ void CMasternode::UpdateLastPaid(const CBlockIndex *pindex, int nMaxBlocksToScan
         if (!dmn || dmn->pdmnState->nLastPaidHeight == -1) {
             LogPrint("masternode", "CMasternode::UpdateLastPaidBlock -- searching for block with payment to %s -- not found\n", outpoint.ToStringShort());
         } else {
-            LOCK(cs_main);
             nBlockLastPaid = (int)dmn->pdmnState->nLastPaidHeight;
             nTimeLastPaid = chainActive[nBlockLastPaid]->nTime;
             LogPrint("masternode", "CMasternode::UpdateLastPaidBlock -- searching for block with payment to %s -- found new %d\n", outpoint.ToStringShort(), nBlockLastPaid);
diff --git a/src/masternodeman.cpp b/src/masternodeman.cpp
index 318b45e1e..0be4cacee 100644
--- a/src/masternodeman.cpp
+++ b/src/masternodeman.cpp
@@ -1817,7 +1817,7 @@ bool CMasternodeMan::CheckMnbAndUpdateMasternodeList(CNode* pfrom, CMasternodeBr
 
 void CMasternodeMan::UpdateLastPaid(const CBlockIndex* pindex)
 {
-    LOCK(cs);
+    LOCK2(cs_main, cs);
 
     if(fLiteMode || !masternodeSync.IsWinnersListSynced() || mapMasternodes.empty()) return;