diff --git a/src/evo/deterministicmns.cpp b/src/evo/deterministicmns.cpp
index f1717382a..5300b2640 100644
--- a/src/evo/deterministicmns.cpp
+++ b/src/evo/deterministicmns.cpp
@@ -11,6 +11,7 @@
 #include "script/standard.h"
 #include "base58.h"
 #include "core_io.h"
+#include "spork.h"
 
 #include <univalue.h>
 
@@ -312,6 +313,10 @@ bool CDeterministicMNManager::ProcessBlock(const CBlock& block, const CBlockInde
                   __func__, nHeight, newList.size());
     }
 
+    if (nHeight == GetSpork15Value()) {
+        LogPrintf("CDeterministicMNManager::%s -- spork15 is active now. nHeight=%d\n", __func__, nHeight);
+    }
+
     CleanupCache(nHeight);
 
     return true;
@@ -326,6 +331,10 @@ bool CDeterministicMNManager::UndoBlock(const CBlock& block, const CBlockIndex*
     evoDb.Erase(std::make_pair(DB_LIST_DIFF, block.GetHash()));
     evoDb.Erase(std::make_pair(DB_LIST_SNAPSHOT, block.GetHash()));
 
+    if (nHeight == GetSpork15Value()) {
+        LogPrintf("CDeterministicMNManager::%s -- spork15 is not active anymore. nHeight=%d\n", __func__, nHeight);
+    }
+
     return true;
 }
 
@@ -473,6 +482,23 @@ bool CDeterministicMNManager::HasValidMNAtChainTip(const uint256& proTxHash)
     return GetListAtChainTip().IsMNValid(proTxHash);
 }
 
+int64_t CDeterministicMNManager::GetSpork15Value()
+{
+    return sporkManager.GetSporkValue(SPORK_15_DETERMINISTIC_MNS_ENABLED);
+}
+
+bool CDeterministicMNManager::IsDeterministicMNsSporkActive(int nHeight)
+{
+    LOCK(cs);
+
+    if (nHeight == -1) {
+        nHeight = tipHeight;
+    }
+
+    int64_t spork15Value = GetSpork15Value();
+    return nHeight >= spork15Value;
+}
+
 void CDeterministicMNManager::CleanupCache(int nHeight)
 {
     AssertLockHeld(cs);
diff --git a/src/evo/deterministicmns.h b/src/evo/deterministicmns.h
index cfea510be..5a8409580 100644
--- a/src/evo/deterministicmns.h
+++ b/src/evo/deterministicmns.h
@@ -401,7 +401,11 @@ public:
     bool HasValidMNAtBlock(const uint256& blockHash, const uint256& proTxHash);
     bool HasValidMNAtChainTip(const uint256& proTxHash);
 
+    bool IsDeterministicMNsSporkActive(int nHeight = -1);
+
 private:
+    void UpdateSpork15Value();
+    int64_t GetSpork15Value();
     void CleanupCache(int nHeight);
 };
 
diff --git a/src/spork.cpp b/src/spork.cpp
index adf3f315e..1d096fa93 100644
--- a/src/spork.cpp
+++ b/src/spork.cpp
@@ -25,6 +25,7 @@ std::map<int, int64_t> mapSporkDefaults = {
     {SPORK_10_MASTERNODE_PAY_UPDATED_NODES,  4070908800ULL}, // OFF
     {SPORK_12_RECONSIDER_BLOCKS,             0},             // 0 BLOCKS
     {SPORK_14_REQUIRE_SENTINEL_FLAG,         4070908800ULL}, // OFF
+    {SPORK_15_DETERMINISTIC_MNS_ENABLED,     4070908800ULL}, // OFF
 };
 
 void CSporkManager::Clear()
@@ -182,6 +183,7 @@ int CSporkManager::GetSporkIDByName(const std::string& strName)
     if (strName == "SPORK_10_MASTERNODE_PAY_UPDATED_NODES")     return SPORK_10_MASTERNODE_PAY_UPDATED_NODES;
     if (strName == "SPORK_12_RECONSIDER_BLOCKS")                return SPORK_12_RECONSIDER_BLOCKS;
     if (strName == "SPORK_14_REQUIRE_SENTINEL_FLAG")            return SPORK_14_REQUIRE_SENTINEL_FLAG;
+    if (strName == "SPORK_15_DETERMINISTIC_MNS_ENABLED")        return SPORK_15_DETERMINISTIC_MNS_ENABLED;
 
     LogPrint("spork", "CSporkManager::GetSporkIDByName -- Unknown Spork name '%s'\n", strName);
     return -1;
@@ -199,6 +201,7 @@ std::string CSporkManager::GetSporkNameByID(int nSporkID)
         case SPORK_10_MASTERNODE_PAY_UPDATED_NODES:     return "SPORK_10_MASTERNODE_PAY_UPDATED_NODES";
         case SPORK_12_RECONSIDER_BLOCKS:                return "SPORK_12_RECONSIDER_BLOCKS";
         case SPORK_14_REQUIRE_SENTINEL_FLAG:            return "SPORK_14_REQUIRE_SENTINEL_FLAG";
+        case SPORK_15_DETERMINISTIC_MNS_ENABLED:        return "SPORK_15_DETERMINISTIC_MNS_ENABLED";
         default:
             LogPrint("spork", "CSporkManager::GetSporkNameByID -- Unknown Spork ID %d\n", nSporkID);
             return "Unknown";
diff --git a/src/spork.h b/src/spork.h
index 60153efc0..4ccd619d1 100644
--- a/src/spork.h
+++ b/src/spork.h
@@ -26,9 +26,10 @@ static const int SPORK_9_SUPERBLOCKS_ENABLED                            = 10008;
 static const int SPORK_10_MASTERNODE_PAY_UPDATED_NODES                  = 10009;
 static const int SPORK_12_RECONSIDER_BLOCKS                             = 10011;
 static const int SPORK_14_REQUIRE_SENTINEL_FLAG                         = 10013;
+static const int SPORK_15_DETERMINISTIC_MNS_ENABLED                     = 10014;
 
 static const int SPORK_START                                            = SPORK_2_INSTANTSEND_ENABLED;
-static const int SPORK_END                                              = SPORK_14_REQUIRE_SENTINEL_FLAG;
+static const int SPORK_END                                              = SPORK_15_DETERMINISTIC_MNS_ENABLED;
 
 extern std::map<int, int64_t> mapSporkDefaults;
 extern CSporkManager sporkManager;