diff --git a/src/cryptonote_config.h b/src/cryptonote_config.h
index 98544e4..1ede2de 100644
--- a/src/cryptonote_config.h
+++ b/src/cryptonote_config.h
@@ -191,7 +191,7 @@
 #define HF_VERSION_CLSAG                        13
 #define HF_VERSION_DETERMINISTIC_UNLOCK_TIME    13
 #define HF_VERSION_BULLETPROOF_PLUS             15
-#define HF_VERSION_VIEW_TAGS                    17
+#define HF_VERSION_VIEW_TAGS                    15
 #define HF_VERSION_2021_SCALING                 15
 
 #define PER_KB_FEE_QUANTIZATION_DECIMALS        1
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index e5c060c..259a9ef 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -1450,9 +1450,16 @@ bool Blockchain::validate_diardi_miner_v2(const block &b) {
   std::string vM;
   cryptonote::address_parse_info pVm;
 
+
   for(auto const& sM : diardi_miners_list) {
-      public_key pKey = boost::get<txout_to_key>(b.miner_tx.vout.back().target).key;
-      if(validate_diardi_reward_key(block_height, sM, 0, pKey, m_nettype)) {
+      public_key pubKey;
+
+      if(!get_output_public_key(b.miner_tx.vout.back(), pubKey)) {
+        LOG_PRINT_L1("Diardi: Failed to get miner public key");
+        return false;
+      }
+
+      if(validate_diardi_reward_key(block_height, sM, b.miner_tx.vout.size() - 1, pubKey, m_nettype)) {
         vM = sM;
         cryptonote::get_account_address_from_str(pVm, m_nettype, vM);
         break;
@@ -1576,6 +1583,7 @@ bool Blockchain::validate_miner_transaction(
       }
 
       if (m_nettype == cryptonote::MAINNET) {
+        //txout_to_key instead of txout_to_tagged_key because we don't have view tags before version 15
         if (!validate_diardi_reward_key(
                 block_height, diardi_maintainer_address,
                 b.miner_tx.vout.size() - 1,
@@ -1594,10 +1602,16 @@ bool Blockchain::validate_miner_transaction(
     std::list<std::string> diardi_miners_list = diardi_addresses_v2(m_nettype);
     cryptonote::address_parse_info diardi_miner_address;
 
+    public_key pubKey;
+    if(!get_output_public_key(b.miner_tx.vout.back(), pubKey)) {
+        LOG_PRINT_L1("Diardi: Failed to get miner public key");
+        return false;
+    }
+
     for (auto const &sM : diardi_miners_list) {
       if (validate_diardi_reward_key(
               m_db->height(), sM, b.miner_tx.vout.size() - 1,
-              boost::get<txout_to_key>(b.miner_tx.vout.back().target).key,
+              pubKey,
               m_nettype)) {
         vM = sM;
         break;
diff --git a/src/cryptonote_core/cryptonote_tx_utils.cpp b/src/cryptonote_core/cryptonote_tx_utils.cpp
index 4d1c343..5c56f67 100644
--- a/src/cryptonote_core/cryptonote_tx_utils.cpp
+++ b/src/cryptonote_core/cryptonote_tx_utils.cpp
@@ -445,14 +445,22 @@ bool construct_miner_tx(size_t height, size_t median_weight,
                              << derivation << ", " << no << ", "
                              << miner_address.m_spend_public_key << ")");
 
-    txout_to_key tk;
-    tk.key = out_eph_public_key;
-
     tx_out out;
     uint64_t amount = out_amounts[no];
     summary_amounts += out.amount = out_amounts[no];
 
-    out.target = tk;
+    if(hard_fork_version < 15) {
+        txout_to_key tk;
+        tk.key = out_eph_public_key;
+        out.target = tk;
+    } else {
+        txout_to_tagged_key tk;
+        crypto::view_tag view_tag;
+        crypto::derive_view_tag(derivation, no, view_tag);
+        tk.key = out_eph_public_key;
+        cryptonote::set_tx_out(amount, out_eph_public_key, true, view_tag, out);
+        out.target = tk;
+    }
 
     tx.vout.push_back(out);
 
@@ -1122,12 +1130,15 @@ bool check_last_diardi_miner(const Blockchain *pbc, std::string wallet_address,
     return false;
   }
 
+  public_key pubKey;
+  if(!get_output_public_key(last_diardi_block.miner_tx.vout.back(), pubKey)) {
+    return false;
+  }
+
   if (validate_diardi_reward_key(
           last_diardi_height, wallet_address,
           last_diardi_block.miner_tx.vout.size() - 1,
-          boost::get<txout_to_key>(
-              last_diardi_block.miner_tx.vout.back().target)
-              .key,
+          pubKey,
           nettype)) {
     return true;
   }