diff --git a/src/carrot_impl/carrot_tx_format_utils.cpp b/src/carrot_impl/carrot_tx_format_utils.cpp
index 60e1322..34ca0df 100644
--- a/src/carrot_impl/carrot_tx_format_utils.cpp
+++ b/src/carrot_impl/carrot_tx_format_utils.cpp
@@ -350,7 +350,8 @@ bool try_load_carrot_from_transaction_v1(const cryptonote::transaction &tx,
 }
 //-------------------------------------------------------------------------------------------------------------------
 cryptonote::transaction store_carrot_to_coinbase_transaction_v1(
-    const std::vector<CarrotCoinbaseEnoteV1> &enotes)
+    const std::vector<CarrotCoinbaseEnoteV1> &enotes,
+    const cryptonote::blobdata &extra_nonce)
 {
     const size_t nouts = enotes.size();
     const std::uint64_t block_index = enotes.at(0).block_index;
@@ -383,8 +384,13 @@ cryptonote::transaction store_carrot_to_coinbase_transaction_v1(
     //ephemeral pubkeys: D_e
     store_carrot_ephemeral_pubkeys_to_extra(enotes, tx.extra);
 
-    //we don't need to sort tx_extra since we only added one field
-    //if you add more tx_extra fields here in the future, then please sort <3
+    //add extra_nonce to tx_extra
+    CHECK_AND_ASSERT_THROW_MES(cryptonote::add_extra_nonce_to_tx_extra(tx.extra, extra_nonce),
+        "store_carrot_to_coinbase_transaction_v1: failed to add extra nonce to tx_extra");
+
+    // sort tx_extra
+    CHECK_AND_ASSERT_THROW_MES(cryptonote::sort_tx_extra(tx.extra, tx.extra),
+        "store_carrot_to_coinbase_transaction_v1: failed to sort tx_extra");
 
     return tx;
 }
diff --git a/src/carrot_impl/carrot_tx_format_utils.h b/src/carrot_impl/carrot_tx_format_utils.h
index 1a1e06e..bf94bad 100644
--- a/src/carrot_impl/carrot_tx_format_utils.h
+++ b/src/carrot_impl/carrot_tx_format_utils.h
@@ -30,6 +30,7 @@
 
 //local headers
 #include "carrot_core/carrot_enote_types.h"
+#include "cryptonote_basic/blobdatatype.h"
 #include "cryptonote_basic/cryptonote_basic.h"
 #include "cryptonote_basic/tx_extra.h"
 
@@ -127,11 +128,12 @@ bool try_load_carrot_from_transaction_v1(const cryptonote::transaction &tx,
 /**
  * brief: store_carrot_to_coinbase_transaction_v1 - store coinbase Carrot info to a cryptonote::transaction
  * param: enotes -
- * param: block_index -
+ * param: extra_nonce -
  * return: a full coinbase transaction containing given Carrot information
  */
 cryptonote::transaction store_carrot_to_coinbase_transaction_v1(
-    const std::vector<CarrotCoinbaseEnoteV1> &enotes);
+    const std::vector<CarrotCoinbaseEnoteV1> &enotes,
+    const cryptonote::blobdata &extra_nonce);
 /**
  * brief: try_load_carrot_coinbase_enote_from_transaction_v1 - load one coinbase Carrot enote from a cryptonote::transaction
  * param: tx -
diff --git a/tests/unit_tests/tx_construction_helpers.cpp b/tests/unit_tests/tx_construction_helpers.cpp
index 70a176d..1f28cac 100644
--- a/tests/unit_tests/tx_construction_helpers.cpp
+++ b/tests/unit_tests/tx_construction_helpers.cpp
@@ -74,7 +74,7 @@ bool construct_miner_tx_fake_reward_1out(const size_t height,
             height,
             coinbase_enotes);
 
-        tx = carrot::store_carrot_to_coinbase_transaction_v1(coinbase_enotes);
+        tx = carrot::store_carrot_to_coinbase_transaction_v1(coinbase_enotes, "");
     }
     else // !is_carrot
     {