diff --git a/src/evo/deterministicmns.cpp b/src/evo/deterministicmns.cpp
index 6f664c05a..a93965f1b 100644
--- a/src/evo/deterministicmns.cpp
+++ b/src/evo/deterministicmns.cpp
@@ -438,6 +438,13 @@ CDeterministicMNManager::CDeterministicMNManager(CEvoDB& _evoDb) :
 
 bool CDeterministicMNManager::ProcessBlock(const CBlock& block, const CBlockIndex* pindex, CValidationState& _state)
 {
+    AssertLockHeld(cs_main);
+
+    bool fDIP0003Active = VersionBitsState(pindex->pprev, Params().GetConsensus(), Consensus::DEPLOYMENT_DIP0003, versionbitscache) == THRESHOLD_ACTIVE;
+    if (!fDIP0003Active) {
+        return true;
+    }
+
     LOCK(cs);
 
     int nHeight = pindex->nHeight;
@@ -457,7 +464,7 @@ bool CDeterministicMNManager::ProcessBlock(const CBlock& block, const CBlockInde
     CDeterministicMNListDiff diff = oldList.BuildDiff(newList);
 
     evoDb.Write(std::make_pair(DB_LIST_DIFF, diff.blockHash), diff);
-    if ((nHeight % SNAPSHOT_LIST_PERIOD) == 0) {
+    if ((nHeight % SNAPSHOT_LIST_PERIOD) == 0 || oldList.GetHeight() == -1) {
         evoDb.Write(std::make_pair(DB_LIST_SNAPSHOT, diff.blockHash), newList);
         LogPrintf("CDeterministicMNManager::%s -- Wrote snapshot. nHeight=%d, mapCurMNs.allMNsCount=%d\n",
             __func__, nHeight, newList.GetAllMNsCount());