diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 8b94a30f0..e766fd6c8 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -3786,8 +3786,7 @@ bool Blockchain::cleanup_handle_incoming_blocks(bool force_sync)
 }
 
 //------------------------------------------------------------------
-//FIXME: unused parameter txs
-void Blockchain::output_scan_worker(const uint64_t amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs, std::unordered_map<crypto::hash, cryptonote::transaction> &txs) const
+void Blockchain::output_scan_worker(const uint64_t amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs) const
 {
   try
   {
@@ -4164,9 +4163,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
     offsets.second.erase(last, offsets.second.end());
   }
 
-  // [output] stores all transactions for each tx_out_index::hash found
-  std::vector<std::unordered_map<crypto::hash, cryptonote::transaction>> transactions(amounts.size());
-
+  // gather all the output keys
   threads = tpool.get_max_concurrency();
   if (!m_db->can_thread_bulk_indices())
     threads = 1;
@@ -4178,7 +4175,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
     for (size_t i = 0; i < amounts.size(); i++)
     {
       uint64_t amount = amounts[i];
-      tpool.submit(&waiter, boost::bind(&Blockchain::output_scan_worker, this, amount, std::cref(offset_map[amount]), std::ref(tx_map[amount]), std::ref(transactions[i])), true);
+      tpool.submit(&waiter, boost::bind(&Blockchain::output_scan_worker, this, amount, std::cref(offset_map[amount]), std::ref(tx_map[amount])), true);
     }
     waiter.wait(&tpool);
   }
@@ -4187,7 +4184,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
     for (size_t i = 0; i < amounts.size(); i++)
     {
       uint64_t amount = amounts[i];
-      output_scan_worker(amount, offset_map[amount], tx_map[amount], transactions[i]);
+      output_scan_worker(amount, offset_map[amount], tx_map[amount]);
     }
   }
 
diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index 9639d4e7d..dfe833fb4 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -916,11 +916,9 @@ namespace cryptonote
      * @param amount the amount
      * @param offsets the indices (indexed to the amount) of the outputs
      * @param outputs return-by-reference the outputs collected
-     * @param txs unused, candidate for removal
      */
     void output_scan_worker(const uint64_t amount,const std::vector<uint64_t> &offsets,
-        std::vector<output_data_t> &outputs, std::unordered_map<crypto::hash,
-        cryptonote::transaction> &txs) const;
+        std::vector<output_data_t> &outputs) const;
 
     /**
      * @brief computes the "short" and "long" hashes for a set of blocks