diff --git a/src/spork.cpp b/src/spork.cpp
index d0e428a84a119..fe4fbf2967f19 100644
--- a/src/spork.cpp
+++ b/src/spork.cpp
@@ -24,6 +24,7 @@ std::map<int, int64_t> mapSporkDefaults = {
     {SPORK_6_NEW_SIGS,                       4070908800ULL}, // OFF
     {SPORK_9_SUPERBLOCKS_ENABLED,            4070908800ULL}, // OFF
     {SPORK_12_RECONSIDER_BLOCKS,             0},             // 0 BLOCKS
+    {SPORK_15_DETERMINISTIC_MNS_ENABLED,     4070908800ULL}, // OFF
     {SPORK_16_INSTANTSEND_AUTOLOCKS,         4070908800ULL}, // OFF
     {SPORK_17_QUORUM_DKG_ENABLED,            4070908800ULL}, // OFF
     {SPORK_18_QUORUM_DEBUG_ENABLED,          4070908800ULL}, // OFF
@@ -285,6 +286,7 @@ int CSporkManager::GetSporkIDByName(const std::string& strName)
     if (strName == "SPORK_6_NEW_SIGS")                          return SPORK_6_NEW_SIGS;
     if (strName == "SPORK_9_SUPERBLOCKS_ENABLED")               return SPORK_9_SUPERBLOCKS_ENABLED;
     if (strName == "SPORK_12_RECONSIDER_BLOCKS")                return SPORK_12_RECONSIDER_BLOCKS;
+    if (strName == "SPORK_15_DETERMINISTIC_MNS_ENABLED")        return SPORK_15_DETERMINISTIC_MNS_ENABLED;
     if (strName == "SPORK_16_INSTANTSEND_AUTOLOCKS")            return SPORK_16_INSTANTSEND_AUTOLOCKS;
     if (strName == "SPORK_17_QUORUM_DKG_ENABLED")               return SPORK_17_QUORUM_DKG_ENABLED;
     if (strName == "SPORK_18_QUORUM_DEBUG_ENABLED")             return SPORK_18_QUORUM_DEBUG_ENABLED;
@@ -303,6 +305,7 @@ std::string CSporkManager::GetSporkNameByID(int nSporkID)
         case SPORK_6_NEW_SIGS:                          return "SPORK_6_NEW_SIGS";
         case SPORK_9_SUPERBLOCKS_ENABLED:               return "SPORK_9_SUPERBLOCKS_ENABLED";
         case SPORK_12_RECONSIDER_BLOCKS:                return "SPORK_12_RECONSIDER_BLOCKS";
+        case SPORK_15_DETERMINISTIC_MNS_ENABLED:        return "SPORK_15_DETERMINISTIC_MNS_ENABLED";
         case SPORK_16_INSTANTSEND_AUTOLOCKS:            return "SPORK_16_INSTANTSEND_AUTOLOCKS";
         case SPORK_17_QUORUM_DKG_ENABLED:               return "SPORK_17_QUORUM_DKG_ENABLED";
         case SPORK_18_QUORUM_DEBUG_ENABLED:             return "SPORK_18_QUORUM_DEBUG_ENABLED";
diff --git a/src/spork.h b/src/spork.h
index 58771708e9df4..55d9d62305564 100644
--- a/src/spork.h
+++ b/src/spork.h
@@ -23,6 +23,7 @@ static const int SPORK_5_INSTANTSEND_MAX_VALUE                          = 10004;
 static const int SPORK_6_NEW_SIGS                                       = 10005;
 static const int SPORK_9_SUPERBLOCKS_ENABLED                            = 10008;
 static const int SPORK_12_RECONSIDER_BLOCKS                             = 10011;
+static const int SPORK_15_DETERMINISTIC_MNS_ENABLED                     = 10014;
 static const int SPORK_16_INSTANTSEND_AUTOLOCKS                         = 10015;
 static const int SPORK_17_QUORUM_DKG_ENABLED                            = 10016;
 static const int SPORK_18_QUORUM_DEBUG_ENABLED                          = 10017;